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	<title>Girinti | Sürünme ve Gevşeme Uygulama Notları - NANOVEA: Malzeme Testleri için Gelişmiş Profilometreler, Tribometreler, Nanoindenterler ve Çizilme Test Cihazları</title>
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	<title>Girinti | Sürünme ve Gevşeme Uygulama Notları - NANOVEA: Malzeme Testleri için Gelişmiş Profilometreler, Tribometreler, Nanoindenterler ve Çizilme Test Cihazları</title>
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		<title>Humidity-Controlled Nanoindentation of Polymer Materials</title>
		<link>https://nanovea.com/tr/humidity-controlled-nanoindentation/?utm_source=rss&#038;utm_medium=rss&#038;utm_campaign=humidity-controlled-nanoindentation</link>
					<comments>https://nanovea.com/tr/humidity-controlled-nanoindentation/#respond</comments>
		
		<dc:creator><![CDATA[Andrew Shore]]></dc:creator>
		<pubDate>Wed, 02 Sep 2026 21:48:17 +0000</pubDate>
				<category><![CDATA[Application Notes]]></category>
		<category><![CDATA[Humidity Mechanical Testing]]></category>
		<category><![CDATA[Indentation | Creep and Relaxation]]></category>
		<category><![CDATA[Indentation | Hardness and Elastic]]></category>
		<category><![CDATA[Laboratory Testing]]></category>
		<category><![CDATA[Mechanical Testing]]></category>
		<guid ispermalink="false">https://nanovea.com/?p=26617</guid>

					<description><![CDATA[<p>Application Note &#124; Environmental Nanoindentation Humidity-Controlled Nanoindentation of Polymer Films Measuring Hardness and Creep Under Controlled Relative Humidity Request Humidity-Controlled Nanoindentation Speak with an Application Engineer Research &#38; Experimental Testing Duanjie Li, PhD &#38; Andrea Novitsky Visual Design &#38; Editorial Andrew Shore Introduction Polymers are viscoelastic materials, meaning their mechanical response can change with time [&#8230;]</p>
<p>The post <a href="https://nanovea.com/tr/humidity-controlled-nanoindentation/">Humidity-Controlled Nanoindentation of Polymer Materials</a> appeared first on <a href="https://nanovea.com/tr">NANOVEA: Advanced Profilometers, Tribometers, Nanoindenters, and Scratch Testers for Materials Testing</a>.</p>
]]></description>
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									<p>Application Note | Environmental Nanoindentation</p>								</div>
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					<h1 class="elementor-heading-title elementor-size-default">Humidity-Controlled Nanoindentation of Polymer Films</h1>				</div>
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					<h2 class="elementor-heading-title elementor-size-default">Measuring Hardness and Creep Under Controlled Relative Humidity</h2>				</div>
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					<h2 class="elementor-heading-title elementor-size-default">Giriş</h2>				</div>
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									<p class="PDq2pG_selectionAnchorContainer" data-start="661" data-end="974">Polymers are viscoelastic materials, meaning their mechanical response can change with time and environmental conditions. Under sustained loading, they can gradually deform through creep, with the rate of deformation influenced by factors such as material properties, exposure time, temperature, and humidity.</p><p data-start="976" data-end="1230">As environmental humidity changes, the mechanical behavior of polymer materials can change as well. Measuring <a href="https://nanovea.com/instrumented-indentation-hardness-elastic-modulus/">hardness and creep</a> under controlled relative humidity provides a quantitative way to evaluate how moisture exposure affects polymer performance.</p>								</div>
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					<h2 class="elementor-heading-title elementor-size-default">Why Humidity-Controlled Nanoindentation Matters</h2>				</div>
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									<p class="PDq2pG_selectionAnchorContainer" data-start="462" data-end="699">The mechanical properties of polymers can change as environmental humidity increases. As moisture is absorbed, polymers may exhibit mechano-sorptive effects, including accelerated creep and changes in deformation behavior under load.</p><p data-start="701" data-end="974">Reliable characterization therefore requires more than measuring the material at a single ambient condition. <a href="https://nanovea.com/humidity-module-mechanical-tester/?utm_source=chatgpt.com">Humidity-controlled nanoindentation</a> enables hardness and creep to be measured while both the sample and indenter are maintained in a uniform controlled environment.</p><p data-start="976" data-end="1333">The NANOVEA Mechanical Tester uses an isolated humidity enclosure around the indentation tip and sample surface to maintain consistent relative humidity during testing. This helps minimize measurement drift caused by humidity gradients and provides a quantitative way to evaluate moisture-dependent mechanical behavior.</p>								</div>
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					<h2 class="elementor-heading-title elementor-size-default">Ölçüm Hedefi</h2>				</div>
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									<p class="PDq2pG_selectionAnchorContainer" data-start="330" data-end="490">The objective of this study was to evaluate how controlled relative humidity influences the hardness and creep behavior of a polymer film using <a href="https://nanovea.com/instrumented-indentation-hardness-elastic-modulus/">nanoindentasyon</a>.</p><p data-start="492" data-end="696">The polymer film was tested in an isolated environment with uniform humidity surrounding both the sample and indenter, allowing its mechanical response to be measured under controlled moisture conditions.</p>								</div>
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									<p class="PDq2pG_selectionAnchorContainer" data-start="249" data-end="475">A polymer film was tested by nanoindentation at 25, 35, 45, 55, 65, and 75% relative humidity. Both the sample and indenter were maintained inside an isolated enclosure with uniform humidity controlled throughout the test.</p>								</div>
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															<img decoding="async" width="1000" height="534" src="https://nanovea.com/wp-content/uploads/2026/09/polymer-film-humidity-controlled-nanoindentation.jpg" class="attachment-full size-full wp-image-26602" alt="Polymer film sample used for humidity-controlled nanoindentation testing" />															</div>
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									<p>Polymer film sample used for humidity-controlled nanoindentation testing.</p>								</div>
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									<p data-start="477" data-end="703">A Berkovich diamond indenter was used with a maximum load of 10 mN. The load was applied and removed at 20 mN/min, and <a href="https://nanovea.com/instrumented-indentation-creep-relaxation/">creep was measured</a> from the change in indentation depth during a 10 s hold at maximum load.</p><p data-start="705" data-end="860">Hardness was calculated using ASTM E2546 and the Oliver &amp; Pharr method. The test conditions are summarized below.</p>								</div>
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									<div style="width: 100%; overflow-x: auto;"><table style="width: 100%; border-collapse: collapse; font-family: inherit;"><tbody><tr><td style="width: 50%; background: #2298c7; color: #ffffff; font-weight: 600; padding: 12px 14px; border: 1px solid #dddddd;">Humidity (%)</td><td style="width: 50%; background: #ffffff; color: #111111; padding: 12px 14px; border: 1px solid #dddddd; text-align: center;">25, 35, 45, 55, 65, 75</td></tr><tr><td style="background: #2298c7; color: #ffffff; font-weight: 600; padding: 12px 14px; border: 1px solid #dddddd;">Maximum load</td><td style="background: #ffffff; color: #111111; padding: 12px 14px; border: 1px solid #dddddd; text-align: center;">10 mN</td></tr><tr><td style="background: #2298c7; color: #ffffff; font-weight: 600; padding: 12px 14px; border: 1px solid #dddddd;">Yükleme oranı</td><td style="background: #ffffff; color: #111111; padding: 12px 14px; border: 1px solid #dddddd; text-align: center;">20 mN/dak</td></tr><tr><td style="background: #2298c7; color: #ffffff; font-weight: 600; padding: 12px 14px; border: 1px solid #dddddd;">Unloading rate</td><td style="background: #ffffff; color: #111111; padding: 12px 14px; border: 1px solid #dddddd; text-align: center;">20 mN/dak</td></tr><tr><td style="background: #2298c7; color: #ffffff; font-weight: 600; padding: 12px 14px; border: 1px solid #dddddd;">Creep time</td><td style="background: #ffffff; color: #111111; padding: 12px 14px; border: 1px solid #dddddd; text-align: center;">10 s</td></tr><tr><td style="background: #2298c7; color: #ffffff; font-weight: 600; padding: 12px 14px; border: 1px solid #dddddd;">Computation method</td><td style="background: #ffffff; color: #111111; padding: 12px 14px; border: 1px solid #dddddd; text-align: center;">ASTM E2546 &amp; Oliver &amp; Pharr</td></tr><tr><td style="background: #2298c7; color: #ffffff; font-weight: 600; padding: 12px 14px; border: 1px solid #dddddd;">Indenter type</td><td style="background: #ffffff; color: #111111; padding: 12px 14px; border: 1px solid #dddddd; text-align: center;">Berkovich diamond</td></tr></tbody></table></div>								</div>
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									<p class="PDq2pG_selectionAnchorContainer" data-start="341" data-end="548">The load-displacement curves show a progressive increase in penetration depth as relative humidity rises, indicating that the polymer film becomes more susceptible to deformation under the same applied load.</p><p data-start="550" data-end="964">Between 25% and 55% relative humidity, hardness decreased gradually from approximately 0.60 to 0.54 GPa, while creep depth increased from 36 to 48 nm. At higher humidity, the changes became substantially more pronounced. Hardness decreased to 0.46 GPa at 65% RH and 0.31 GPa at 75% RH, while creep depth increased to 80 nm and 105 nm, respectively.</p><p data-start="966" data-end="1315">The original study attributes this stronger response at elevated humidity to moisture absorption and swelling of the polymer film. It identifies the transition between 55% and 65% RH as the range where swelling becomes significant, corresponding with the sharp increase in creep observed during indentation.</p><p data-start="1317" data-end="1669">These results demonstrate why humidity can be an important test variable when evaluating polymers intended for moisture-rich environments. Measuring both hardness and creep across controlled humidity levels provides a more complete view of how the material responds mechanically as environmental conditions change.</p>								</div>
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															<img loading="lazy" decoding="async" width="1000" height="804" src="https://nanovea.com/wp-content/uploads/2026/09/humidity-controlled-nanoindentation-load-displacement-polymer-film.jpg" class="attachment-full size-full wp-image-26600" alt="Load-displacement curves from humidity-controlled nanoindentation of a polymer film at 25% to 75% relative humidity" />															</div>
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									<p>Nanoindentation load-displacement curves at relative humidity levels from 25% to 75%.</p>								</div>
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															<img loading="lazy" decoding="async" width="1200" height="884" src="https://nanovea.com/wp-content/uploads/2026/09/polymer-hardness-creep-relative-humidity-nanoindentation.jpg" class="attachment-full size-full wp-image-26601" alt="Graph showing polymer hardness decreasing and creep depth increasing from 25% to 75% relative humidity during nanoindentation" />															</div>
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									<p>Polymer hardness decreases while creep depth increases as relative humidity rises from 25% to 75%.</p>								</div>
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				<section class="elementor-section elementor-top-section elementor-element elementor-element-683f81e elementor-section-boxed elementor-section-height-default elementor-section-height-default" data-id="683f81e" data-element_type="section">
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					<h2 class="elementor-heading-title elementor-size-default">Sonuç</h2>				</div>
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									<p class="PDq2pG_selectionAnchorContainer" data-start="430" data-end="672">Humidity-controlled nanoindentation revealed a clear change in the mechanical response of the polymer film as relative humidity increased. Across the tested range from 25% to 75% RH, hardness progressively decreased while creep increased.</p><p data-start="674" data-end="984">At 65% RH and above, the polymer exhibited substantially greater creep deformation during the hold at maximum load, corresponding with the sharper reduction in hardness observed at higher humidity.</p><p data-start="986" data-end="1417">By maintaining both the sample and indenter within an isolated environment of uniform relative humidity, the NANOVEA Mechanical Tester enables hardness and creep to be measured while minimizing the influence of humidity-gradient drift. This provides a quantitative method for evaluating the moisture-dependent mechanical behavior of polymer materials under controlled environmental conditions.</p>								</div>
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				<section class="elementor-section elementor-top-section elementor-element elementor-element-a2dee8e elementor-section-boxed elementor-section-height-default elementor-section-height-default" data-id="a2dee8e" data-element_type="section" data-settings="{&quot;background_background&quot;:&quot;classic&quot;}">
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					<h2 class="elementor-heading-title elementor-size-default">Frequently Asked Questions About Humidity-Controlled Nanoindentation</h2>				</div>
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					<h3 class="elementor-heading-title elementor-size-default">Why does humidity affect polymer hardness and creep?</h3>				</div>
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									<p data-start="168" data-end="494">Polymers can absorb moisture from the surrounding environment, which can alter their mechanical response. Depending on the material, increased moisture can reduce resistance to deformation and increase time-dependent creep. In this study, increasing relative humidity corresponded with decreasing hardness and increasing creep depth.</p>								</div>
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					<h3 class="elementor-heading-title elementor-size-default">Can nanoindentation be performed under controlled humidity?</h3>				</div>
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									<p data-start="658" data-end="746">Yes. Nanoindentation can be performed inside a controlled environmental enclosure so that both the sample and indenter are exposed to a defined relative humidity during testing. This makes it possible to compare mechanical properties under different moisture conditions rather than relying solely on uncontrolled ambient laboratory conditions.</p>								</div>
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					<h3 class="elementor-heading-title elementor-size-default">Why test polymers at controlled relative humidity instead of ambient conditions?</h3>				</div>
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									<p data-start="168" data-end="494">Ambient humidity can vary and may not represent the conditions a polymer experiences during storage, processing, or use. Controlling relative humidity allows the environmental condition to become a defined test variable, making it possible to determine whether changes in hardness, creep, or deformation behavior are associated with moisture exposure.</p>								</div>
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					<h3 class="elementor-heading-title elementor-size-default">What mechanical properties can be measured under controlled humidity?</h3>				</div>
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									<p class="PDq2pG_selectionAnchorContainer" data-start="1348" data-end="1612">Depending on the test method, nanoindentation can evaluate properties including hardness, elastic modulus, and time-dependent creep behavior under controlled environmental conditions. In this study, hardness and creep were measured as relative humidity changed.</p>								</div>
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				<div class="elementor-element elementor-element-3d372dd elementor-widget elementor-widget-heading" data-id="3d372dd" data-element_type="widget" data-widget_type="heading.default">
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					<h3 class="elementor-heading-title elementor-size-default">What materials can benefit from humidity-controlled nanoindentation?</h3>				</div>
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									<p data-start="168" data-end="494">Humidity-controlled testing can be particularly useful for polymers, thin films, coatings, and other materials whose mechanical behavior may be influenced by moisture absorption. The appropriate humidity range and indentation conditions depend on the material and application.</p>								</div>
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					<h3 class="elementor-heading-title elementor-size-default">How can humidity-controlled nanoindentation support material development?</h3>				</div>
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									<p data-start="168" data-end="494">Testing across multiple relative humidity levels can reveal whether a material maintains its mechanical properties as environmental moisture changes. This can support material comparison, formulation development, coating evaluation, failure investigation, and the assessment of materials intended for humidity-sensitive applications.</p>								</div>
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					<h3 class="elementor-heading-title elementor-size-default">Can NANOVEA perform humidity-controlled nanoindentation as a laboratory service?</h3>				</div>
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									<div class="qMYqUG_convSearchResultHighlightRoot"><div class="" data-turn-id-container="request-6a84dde8-f41c-83ea-94d2-f10002028a3f-19" data-is-intersecting="true"><section class="text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [&amp;:has([data-writing-block])&gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]" dir="auto" data-turn-id="request-6a84dde8-f41c-83ea-94d2-f10002028a3f-19" data-turn-id-container="request-6a84dde8-f41c-83ea-94d2-f10002028a3f-19" data-testid="conversation-turn-48" data-turn="assistant"><div class="text-base my-auto mx-auto pb-8 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)"><div class="[--thread-content-max-width:40rem] @w-lg/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn" data-conversation-screenshot-content=""><div class="flex max-w-full flex-col gap-4 grow"><div class="min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+&amp;]:mt-1" dir="auto" tabindex="0" data-message-author-role="assistant" data-message-id="407e6e87-17bc-4179-ae8c-7d1aa4b9d36c" data-turn-start-message="true" data-message-model-slug="gpt-5-6-thinking"><div class="flex w-full flex-col gap-1 empty:hidden"><div class="markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling"><p class="PDq2pG_selectionAnchorContainer" data-start="2709" data-end="3016" data-is-last-node="" data-is-only-node="">Yes. NANOVEA can perform nanoindentation testing under controlled environmental conditions to evaluate properties such as hardness and creep as humidity changes. Test parameters can be selected according to the material, expected service conditions, and the specific engineering question being investigated.</p></div></div></div></div><div class="z-0 flex min-h-[46px] justify-start"> </div></div><div class="[--thread-content-max-width:40rem] @w-lg/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1" data-conversation-screenshot-content=""><div> </div></div></div></section></div></div><div class="pointer-events-none -mt-px h-px translate-y-(--scroll-root-safe-area-inset-bottom)" aria-hidden="true"> </div>								</div>
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					<h2 class="elementor-heading-title elementor-size-default">Need Humidity-Controlled Nanoindentation for Your Material?</h2>				</div>
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				</div><p>The post <a href="https://nanovea.com/tr/humidity-controlled-nanoindentation/">Humidity-Controlled Nanoindentation of Polymer Materials</a> appeared first on <a href="https://nanovea.com/tr">NANOVEA: Advanced Profilometers, Tribometers, Nanoindenters, and Scratch Testers for Materials Testing</a>.</p>
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		<title>Hidrojelin Mekanik Özellikleri</title>
		<link>https://nanovea.com/tr/hi%cc%87drojeli%cc%87n-mekani%cc%87k-ozelli%cc%87kleri%cc%87/?utm_source=rss&#038;utm_medium=rss&#038;utm_campaign=mechanical-properties-of-hydrogel</link>
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		<dc:creator><![CDATA[nanovea]]></dc:creator>
		<pubDate>21 Eylül 2021 Salı 20:41:24 +0000</pubDate>
				<category><![CDATA[Application Notes]]></category>
		<category><![CDATA[Indentation | Creep and Relaxation]]></category>
		<category><![CDATA[Indentation | Hardness and Elastic]]></category>
		<category><![CDATA[Laboratory Testing]]></category>
		<category><![CDATA[Mechanical Testing]]></category>
		<guid ispermalink="false">https://nanovea.com/?p=15550</guid>

					<description><![CDATA[<p>MECHANICAL PROPERTIES OF HYDROGEL USING NANOINDENTATION Prepared by DUANJIE LI, PhD &#38; JORGE RAMIREZ INTRODUCTION Hydrogel is known for its super absorbency of water allowing for a close resemblance in flexibility as natural tissues. This resemblance has made hydrogel a common choice not only in biomaterials, but also in electronics, environment and consumer good applications [&#8230;]</p>
<p>The post <a href="https://nanovea.com/tr/hi%cc%87drojeli%cc%87n-mekani%cc%87k-ozelli%cc%87kleri%cc%87/">Mechanical Properties of Hydrogel</a> appeared first on <a href="https://nanovea.com/tr">NANOVEA: Advanced Profilometers, Tribometers, Nanoindenters, and Scratch Testers for Materials Testing</a>.</p>
]]></description>
										<content:encoded><![CDATA[<div data-elementor-type="wp-post" data-elementor-id="15550" class="elementor elementor-15550" data-elementor-post-type="post">
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					<h1 class="elementor-heading-title elementor-size-default">HIDROJELIN MEKANIK ÖZELLIKLERI</h1>				</div>
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					<h2 class="elementor-heading-title elementor-size-default">NANOINDENTASYON KULLANARAK</h2>				</div>
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															<img loading="lazy" decoding="async" width="768" height="242" src="https://nanovea.com/wp-content/uploads/2021/09/Mechanical-Properties-of-Hydrogel-Analysis.jpg" class="attachment-medium_large size-medium_large wp-image-15552" alt="HIDROJELIN MEKANIK ÖZELLIKLERI" />															</div>
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					<h2 class="elementor-heading-title elementor-size-default">Tarafından hazırlanmıştır</h2>				</div>
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					<h2 class="elementor-heading-title elementor-size-default">DUANJIE LI, PhD &amp; JORGE RAMIREZ</h2>				</div>
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					<h2 class="elementor-heading-title elementor-size-default">GİRİŞ</h2>				</div>
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									<p><span class="fontstyle0">Hidrojel, esneklik açısından doğal dokulara yakın bir benzerlik sağlayan süper su emiciliği ile bilinir. Bu benzerlik, hidrojeli sadece biyomalzemelerde değil, aynı zamanda elektronik, çevre ve kontakt lens gibi tüketici malları uygulamalarında da yaygın bir seçim haline getirmiştir. Her benzersiz uygulama, özel hidrojel mekanik özellikleri gerektirir.</span></p>								</div>
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					<h2 class="elementor-heading-title elementor-size-default">HIDROJELLER IÇIN NANOINDENTASYONUN ÖNEMI</h2>				</div>
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									<p style="text-align: justify;"><span class="fontstyle0">Hidrojeller, Nanoindentasyon için test parametrelerinin seçimi ve numune hazırlama gibi benzersiz zorluklar yaratır. Birçok nanoindentasyon sistemi, orijinal olarak aşağıdakiler için tasarlanmadığından büyük sınırlamalara sahiptir&nbsp;</span><span style="color: var( --e-global-color-secondary ); background-color: rgba(255, 255, 255, 0);">bu tür yumuşak malzemeler. Bazı nanoindentasyon sistemleri, numuneye kuvvet uygulamak için bir bobin/mıknatıs düzeneği kullanır. Gerçek bir kuvvet ölçümü yoktur, bu da yumuşak malzemeleri test ederken hatalı ve doğrusal olmayan yüklemeye yol açar.&nbsp;</span><span style="color: var( --e-global-color-secondary ); background-color: rgba(255, 255, 255, 0);">malzemeler. Temas noktasını belirlemek son derece zordur çünkü&nbsp;</span><span class="fontstyle0" style="color: var( --e-global-color-secondary ); background-color: rgba(255, 255, 255, 0);">derinlik gerçekte ölçülen tek parametredir. Eğimdeki değişimi gözlemlemek neredeyse imkansızdır. </span><span class="fontstyle2" style="color: var( --e-global-color-secondary ); background-color: rgba(255, 255, 255, 0);">Zamana Karşı Derinlik </span><span class="fontstyle0" style="color: var( --e-global-color-secondary ); background-color: rgba(255, 255, 255, 0);">sırasında arsa&nbsp;</span><span style="color: var( --e-global-color-secondary ); background-color: rgba(255, 255, 255, 0);">indenter ucunun hidrojel malzemeye yaklaştığı dönem.</span></p>
<p style="text-align: justify;"><span class="fontstyle0">Bu sistemlerin sınırlamalarının üstesinden gelmek için, nano modül </span><span class="fontstyle2">NANOVEA </span><span class="fontstyle0"><a href="https://nanovea.com/mechanical-testers/">Mekanik Test Cihazı</a> Yumuşak veya sert tüm malzeme türlerinde yüksek doğruluk sağlamak için ayrı bir yük hücresiyle kuvvet geri bildirimini ölçer. Piezo kontrollü yer değiştirme son derece hassas ve hızlıdır. Bu, bobin/mıknatıs düzeneğine sahip ve kuvvet geri bildirimi olmayan sistemlerin dikkate alması gereken birçok teorik varsayımı ortadan kaldırarak viskoelastik özelliklerin eşsiz ölçümüne olanak tanır.</span></p>								</div>
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					<h2 class="elementor-heading-title elementor-size-default">ÖLÇÜM HEDEFI</h2>				</div>
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									<p><span class="fontstyle0">Bu uygulamada </span><span class="fontstyle2">NANOVEA </span><span class="fontstyle0">Mekanik Test Cihazı, Nanoindentasyon modunda, bir hidrojel numunesinin sertliğini, elastik modülünü ve sürünmesini incelemek için kullanılır.</span></p>								</div>
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									<p style="text-align: center; font-size: 20pt; color: black;">NANOVEA <span style="font-size: 20pt; color: #1b96cf;">PB1000 </span><span style="font-size: 20pt;">Mekanik Test Cihazı</span></p>								</div>
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									<span class="elementor-button-text">BROŞÜRÜ INDIR</span>
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									<span class="elementor-button-text">TEKLİF ALIN</span>
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																<a href="https://nanovea.com/instruments/pb1000/">
							<img loading="lazy" decoding="async" width="750" height="804" src="https://nanovea.com/wp-content/uploads/2020/12/Nanovea-PB1000-scratch-test-and-indentation.png" class="elementor-animation-grow attachment-medium_large size-medium_large wp-image-9934" alt="nanoindenter ve çizik test cihazı Nanovea PB1000" />								</a>
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					<h2 class="elementor-heading-title elementor-size-default">TEST KOŞULLARI</h2>				</div>
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									<p><span class="fontstyle0">Cam lam üzerine yerleştirilen bir hidrojel örneği, nanoindentasyon tekniği kullanılarak test edilmiştir. </span><span class="fontstyle2">NANOVEA </span><span class="fontstyle0">Mekanik Test Cihazı. Bu yumuşak malzeme için 3 mm çapında küresel bir uç kullanılmıştır. Yükleme süresi boyunca yük doğrusal olarak 0,06 ila 10 mN arasında artmıştır. Sürünme daha sonra 70 saniye boyunca maksimum 10 mN yükte girinti derinliğinin değişimi ile ölçülmüştür.</span></p>								</div>
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									<p style="text-align: center;"><span class="fontstyle0" style="color: #1b96cf;">YAKLAŞMA HIZI: </span><span class="fontstyle0" style="color: #1b96cf;"><span style="color: #000000;">100 μm/dak</span></span></p>								</div>
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									İLETİŞİM YÜKÜ								</div>
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									0,06 mN								</div>
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									MAKS YÜK								</div>
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									10 mN								</div>
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									YÜKLEME ORANI								</div>
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									<p>20 mN/dak</p>								</div>
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									CREEP								</div>
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									70 s								</div>
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															<img loading="lazy" decoding="async" width="722" height="306" src="https://nanovea.com/wp-content/uploads/2021/09/Spherical-Indenter-Type-Mechanical-Tester.png" class="attachment-large size-large wp-image-15560" alt="Hidrojel Testi İndentasyon" />															</div>
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					<h2 class="elementor-heading-title elementor-size-default">SONUÇLAR &amp; TARTIŞMA</h2>				</div>
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									<p><span class="fontstyle0">Yükün ve derinliğin zamanın bir fonksiyonu olarak gelişimi aşağıda gösterilmiştir </span><span class="fontstyle2">FÜGÜR 1</span><span class="fontstyle0">. Bu grafikte de görülebileceği gibi </span><span class="fontstyle2">Zamana Karşı Derinlik</span><span class="fontstyle0">Yükleme periyodunun başlangıcında eğimin değiştiği noktayı belirlemek çok zordur, bu da genellikle indenterin yumuşak malzemeyle temas etmeye başladığı yerin bir göstergesi olarak çalışır. Bununla birlikte, grafik </span><span class="fontstyle2">Zamana Karşı Yük </span><span class="fontstyle0">uygulanan bir yük altında hidrojelin kendine özgü davranışını göstermektedir. Hidrojel bilyeli girintiyle temas etmeye başladığında, hidrojel yüzey gerilimi nedeniyle bilyeli girintiyi çeker ve bu da yüzey alanını azaltma eğilimindedir. Bu davranış, yükleme aşamasının başlangıcında negatif ölçülen yüke yol açar. İndenter hidrojelin içine battıkça yük kademeli olarak artar ve daha sonra hidrojelin sürünme davranışını incelemek için 70 saniye boyunca maksimum 10 mN yükte sabit olacak şekilde kontrol edilir.</span></p>								</div>
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															<img loading="lazy" decoding="async" width="551" height="430" src="https://nanovea.com/wp-content/uploads/2021/09/Hydrogel-Indentation-Testing.jpg" class="attachment-large size-large wp-image-15555" alt="hidrojel karakterizasyonu" />															</div>
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															<img loading="lazy" decoding="async" width="551" height="430" src="https://nanovea.com/wp-content/uploads/2021/09/Hydrogel-Nanoindentation-Testing.jpg" class="attachment-large size-large wp-image-15557" alt="hidrojellerin nanoindentasyonu" />															</div>
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									<p style="text-align: center;"><span class="fontstyle0" style="color: #1b96cf;">ŞEKİL 1: </span><span class="fontstyle0" style="color: #1b96cf;"><span style="color: #000000;">Zamanın bir fonksiyonu olarak yük ve derinliğin evrimi.</span></span></p>								</div>
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									<p><span class="fontstyle0">Arsa </span><span class="fontstyle2">Zamana Karşı Sürünme Derinliği </span><span class="fontstyle0">içinde gösterilir </span><span class="fontstyle2">ŞEKİL 2</span><span class="fontstyle0">ve </span><span class="fontstyle2">Yük ve Yer Değiştirme </span><span class="fontstyle0">nanoindentasyon testinin grafiği şurada gösterilmiştir </span><span class="fontstyle2">ŞEKİL 3</span><span class="fontstyle0">. Bu çalışmadaki hidrojel, Oliver-Pharr yöntemi kullanılarak yük yer değiştirme eğrisine dayalı olarak hesaplandığı üzere 16,9 KPa sertliğe ve 160,2 KPa Young modülüne sahiptir.</span></p><p><span class="fontstyle0">Sürünme, bir hidrojelin mekanik özelliklerinin incelenmesi için önemli bir faktördür. Piezo ve ultra hassas yük hücresi arasındaki yakın döngü geri besleme kontrolü, maksimum yükte sünme süresi boyunca gerçek bir sabit yükleme sağlar. Gösterildiği gibi </span><span class="fontstyle2">ŞEKİL 2</span><span class="fontstyle0">hidrojel, 3 mm bilye ucu tarafından uygulanan 10 mN maksimum yük altında 70 saniye içinde sürünme sonucu ~42 μm azalır.</span></p>								</div>
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															<img loading="lazy" decoding="async" width="643" height="416" src="https://nanovea.com/wp-content/uploads/2021/09/Hydrogel-Mechanical-Properties-2-12b-13.jpg" class="attachment-large size-large wp-image-15556" alt="hidrojellerin mekanik testi" />															</div>
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									<p style="text-align: center;"><span class="fontstyle0" style="color: #1b96cf;">ŞEKİL 2: </span><span class="fontstyle0" style="color: #1b96cf;"><span style="color: #000000;">Maksimum 10 mN yükte 70 saniye boyunca sürünme.</span></span></p>								</div>
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															<img loading="lazy" decoding="async" width="936" height="376" src="https://nanovea.com/wp-content/uploads/2021/09/Hydrogel-Study-Load-vs-Displacement.jpg" class="attachment-large size-large wp-image-15558" alt="hidrojel dayanıklılık testi" />															</div>
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									<p style="text-align: center;"><span class="fontstyle0" style="color: #1b96cf;">ŞEKİL 3: </span><span class="fontstyle0" style="color: #1b96cf;"><span style="color: #000000;">Hidrojelin Yüke Karşı Yer Değiştirme grafiği.</span></span></p>								</div>
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					<h2 class="elementor-heading-title elementor-size-default">SONUÇ</h2>				</div>
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									<p><span class="fontstyle0">Bu çalışmada, Türkiye'de </span><span class="fontstyle2">NANOVEA </span><span class="fontstyle0">Mekanik Test Cihazı, Nanoindentasyon modunda, sertlik, Young modülü ve sünme dahil olmak üzere bir hidrojelin mekanik özelliklerinin hassas ve tekrarlanabilir bir ölçümünü sağlar. Büyük 3 mm bilye ucu, hidrojel yüzeyine karşı uygun teması sağlar. Yüksek hassasiyetli motorlu numune tablası, hidrojel numunesinin düz yüzünün bilye ucunun altına doğru şekilde konumlandırılmasını sağlar. Bu çalışmadaki hidrojel 16,9 KPa sertlik ve 160,2 KPa Young modülü sergilemektedir. Sürünme derinliği, 70 saniye boyunca 10 mN yük altında ~42 μm'dir.</span></p><p><span class="fontstyle2">NANOVEA </span><span class="fontstyle0">Mekanik Test Cihazları, tek bir platformda benzersiz çok fonksiyonlu Nano ve Mikro modüller sağlar. Her iki modül de çizik test cihazı, sertlik test cihazı ve aşınma test cihazı modu içerir ve tek bir platformda mevcut olan en geniş ve en kullanıcı dostu test yelpazesini sunar.<br />Sistem.</span></p>								</div>
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					<h2 class="elementor-heading-title elementor-size-default">Benzer bir uygulamanız var mı?</h2>				</div>
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									<span class="elementor-button-text">ŞIMDI BIR UZMANLA GÖRÜŞÜN</span>
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									<span class="elementor-button-text">FİYATLANDIRMA VE DETAYLARI HIZLI ALIN</span>
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				</div><p>The post <a href="https://nanovea.com/tr/hi%cc%87drojeli%cc%87n-mekani%cc%87k-ozelli%cc%87kleri%cc%87/">Mechanical Properties of Hydrogel</a> appeared first on <a href="https://nanovea.com/tr">NANOVEA: Advanced Profilometers, Tribometers, Nanoindenters, and Scratch Testers for Materials Testing</a>.</p>
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		<title>Nanoindentasyon ile Polimerlerin Sürünme Deformasyonu</title>
		<link>https://nanovea.com/tr/nanoindentasyon-kullanarak-polimerlerin-surunme-deformasyonu/?utm_source=rss&#038;utm_medium=rss&#038;utm_campaign=creep-deformation-of-polymers-using-nanoindentation</link>
					<comments>https://nanovea.com/tr/nanoindentasyon-kullanarak-polimerlerin-surunme-deformasyonu/#respond</comments>
		
		<dc:creator><![CDATA[nanovea]]></dc:creator>
		<pubDate>Thu, 13 May 2021 19:38:09 +0000</pubDate>
				<category><![CDATA[Application Notes]]></category>
		<category><![CDATA[Indentation | Creep and Relaxation]]></category>
		<category><![CDATA[Laboratory Testing]]></category>
		<category><![CDATA[Mechanical Testing]]></category>
		<guid ispermalink="false">https://nanovea.com/?p=11346</guid>

					<description><![CDATA[<p>Creep Deformation of Polymers using Nanoindentation Learn more</p>
<p>The post <a href="https://nanovea.com/tr/nanoindentasyon-kullanarak-polimerlerin-surunme-deformasyonu/">Creep Deformation of Polymers using Nanoindentation</a> appeared first on <a href="https://nanovea.com/tr">NANOVEA: Advanced Profilometers, Tribometers, Nanoindenters, and Scratch Testers for Materials Testing</a>.</p>
]]></description>
										<content:encoded><![CDATA[<div data-elementor-type="wp-post" data-elementor-id="11346" class="elementor elementor-11346" data-elementor-post-type="post">
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									<p>Nanoindentasyon ile Polimerlerin Sürünme Deformasyonu</p><p>Daha fazla bilgi edinin</p>								</div>
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					<h2 class="elementor-heading-title elementor-size-default"><span>SÜRÜNME DEFORMASYONU</span></h2>				</div>
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					<h2 class="elementor-heading-title elementor-size-default"><span>NANOINDENTASYON KULLANARAK POLIMERLERIN</span></h2>				</div>
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															<img loading="lazy" decoding="async" width="1024" height="290" src="https://nanovea.com/wp-content/uploads/2021/05/Creep-Deformation-of-Polymers-Using-Nanoindentation.jpg" class="attachment-large size-large wp-image-11348" alt="" />															</div>
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					<h2 class="elementor-heading-title elementor-size-default">Tarafından hazırlanmıştır</h2>				</div>
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					<h2 class="elementor-heading-title elementor-size-default"><span>DUANJIE LI</span><span style="font-size:17pt">, Doktora </span><span></h2>				</div>
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					<h2 class="elementor-heading-title elementor-size-default">GİRİŞ</h2>				</div>
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									<p>Viskoelastik malzemeler olarak polimerler, genellikle sürünme olarak da bilinen belirli bir uygulanan yük altında zamana bağlı bir deformasyona uğrarlar. Polimerik parçalar, yapısal bileşenler, bağlantılar ve bağlantı parçaları ve hidrostatik basınçlı kaplar gibi sürekli strese maruz kalacak şekilde tasarlandığında sürünme kritik bir faktör haline gelir.</p>								</div>
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					<h2 class="elementor-heading-title elementor-size-default">IÇIN SÜRÜNME ÖLÇÜMÜNÜN ÖNEMI
POLİMERLER</h2>				</div>
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									<p>Viskoelastisitenin doğal doğası, polimerlerin performansında hayati bir rol oynar ve hizmet güvenilirliğini doğrudan etkiler. Yükleme ve sıcaklık gibi çevresel koşullar polimerlerin sürünme davranışını etkiler. Sünme arızaları sıklıkla, belirli hizmet koşulları altında kullanılan polimer malzemelerin zamana bağlı sünme davranışının dikkate alınmaması nedeniyle meydana gelir. Sonuç olarak polimerlerin viskoelastik mekanik davranışlarının güvenilir ve niceliksel bir testinin geliştirilmesi önemlidir. NANOVEA&#039;nın Nano modülü <a href="https://nanovea.com/mechanical-testers/">Mekanik Test Cihazları</a> yükü yüksek hassasiyetli bir piezo ile uygular ve kuvvetin ve yer değiştirmenin gelişimini yerinde doğrudan ölçer. Doğruluk ve tekrarlanabilirliğin birleşimi onu sürünme ölçümü için ideal bir araç haline getirir.</p>								</div>
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									<p>ÖLÇÜM HEDEFI</p>								</div>
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									<p>Bu uygulamada şunu gösterdik<br />NANOVEA PB1000 Mekanik Test Cihazı<br />içinde <a href="https://nanovea.com/nano-indentation-tester/">Nanoindentasyon</a> modu ideal bir araçtır<br />viskoelastik mekanik özelliklerin incelenmesi için<br />sertlik, Young modülü dahil<br />ve polimerik malzemelerin sünmesi.</p>								</div>
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									<p>NANOVEA</p>								</div>
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									<p>PB1000</p>								</div>
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																<a href="https://nanovea.com/instruments/pb1000/">
							<img loading="lazy" decoding="async" width="750" height="804" src="https://nanovea.com/wp-content/uploads/2020/12/Nanovea-PB1000-scratch-test-and-indentation.png" class="elementor-animation-grow attachment-large size-large wp-image-9934" alt="nanoindenter ve çizik test cihazı Nanovea PB1000" />								</a>
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									TEST KOŞULLARI								</div>
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									<p>Sekiz farklı polimer numunesi NANOVEA PB1000 Mekanik Test Cihazı kullanılarak nanoindentasyon tekniği ile test edilmiştir. Yük 0 ila 40 mN arasında doğrusal olarak artarken, yükleme aşaması sırasında derinlik kademeli olarak artmıştır. Sürünme daha sonra 30 saniye boyunca maksimum 40 mN yükte indentasyon derinliğinin değişimi ile ölçülmüştür.</p>								</div>
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									<span class="fontstyle0" style="color: #000000;">MAKSİMUM YÜK </span><span class="fontstyle0" style="color: #1b96cf;"> <space> <space> <space> <space> 40 mN </span>								</div>
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									<span class="fontstyle0" style="color: #000000;">YÜKLEME ORANI </span><br><span class="fontstyle0" style="color: #1b96cf;"> 80 mN/dak </span>								</div>
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									<span class="fontstyle0" style="color: #000000;">BOŞALTMA ORANI </span>
<span class="fontstyle0" style="color: #1b96cf;"> 80 mN/dak </span>								</div>
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									<span class="fontstyle0" style="color: #000000;">CREEP ZAMANI </span><br><span class="fontstyle0" style="color: #1b96cf;"> 30 s </span>								</div>
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									<p><em><strong>GİRDİ TÜRÜ</strong></em></p>								</div>
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									<p><em><strong>Berkovich</strong></em></p>								</div>
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									<p><strong><em>Elmas</em></strong></p>								</div>
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															<img loading="lazy" decoding="async" width="678" height="332" src="https://nanovea.com/wp-content/uploads/2021/05/Setup-of-the-nanoindentation-test-NANOVEA-Mechanical-Tester.png" class="attachment-large size-large wp-image-11354" alt="" />															</div>
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									<p><span class="fontstyle0" style="color: #1b96cf;">*</span><span class="fontstyle0" style="color: #000000;">nanoindentasyon testinin kurulumu</span></p>								</div>
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									SONUÇLAR &amp; TARTIŞMA								</div>
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									<p>Farklı polimer numuneleri üzerinde yapılan nanoindentasyon testlerinin yüke karşı yer değiştirme grafiği ŞEKİL 1'de gösterilmiş ve sürünme eğrileri ŞEKİL 2'de karşılaştırılmıştır. Sertlik ve Young modülü ŞEKİL 3'te özetlenmiş ve sürünme derinliği ŞEKİL 4'te gösterilmiştir. ŞEKİL 1'de bir örnek olarak, nanoindentasyon ölçümü için yük-yer değiştirme eğrisinin AB, BC ve CD kısımları sırasıyla yükleme, sürünme ve boşaltma süreçlerini temsil etmektedir.</p><p>Delrin ve PVC sırasıyla 0,23 ve 0,22 GPa ile en yüksek sertliği sergilerken, AYPE test edilen polimerler arasında 0,026 GPa ile en düşük sertliğe sahiptir. Genel olarak, daha sert polimerler daha düşük sürünme oranları göstermektedir. En yumuşak AYPE, Delrin için ~120 nm'ye kıyasla 798 nm ile en yüksek sürünme derinliğine sahiptir.</p><p>Polimerlerin sünme özellikleri, yapısal parçalarda kullanıldıklarında kritik öneme sahiptir. Polimerlerin sertliği ve sünmesi hassas bir şekilde ölçülerek, polimerlerin zamana bağlı güvenilirliği daha iyi anlaşılabilir. Sürünme, belirli bir yükte yer değiştirmenin değişimi, NANOVEA PB1000 Mekanik Test Cihazı kullanılarak farklı yüksek sıcaklıklarda ve nemde de ölçülebilir ve polimerlerin viskoelastik mekanik davranışlarını nicel ve güvenilir bir şekilde ölçmek için ideal bir araç sağlar<br />simüle edilmiş gerçekçi uygulama ortamında.</p>								</div>
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															<img loading="lazy" decoding="async" width="576" height="453" src="https://nanovea.com/wp-content/uploads/2021/05/The-load-vs-displacement-plots-of-different-polymers-NANOVEA.png" class="attachment-large size-large wp-image-11355" alt="" />															</div>
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									<p style="text-align: center;"><span class="fontstyle0" style="color: #1b96cf;">ŞEKİL 1: </span><span class="fontstyle0" style="color: #000000;">Yük ve yer değiştirme grafikleri<br />farklı polimerlerin.</span></p>								</div>
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															<img loading="lazy" decoding="async" width="576" height="453" src="https://nanovea.com/wp-content/uploads/2021/05/Creeping-at-a-maximum-load-of-40-mN-for-30-s-NANOVEA.png" class="attachment-large size-large wp-image-11350" alt="" />															</div>
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									<p style="text-align: center;"><span class="fontstyle0" style="color: #1b96cf;">ŞEKİL 2: </span><span class="fontstyle0" style="color: #000000;">Maksimum 40 mN yükte 30 saniye boyunca sürünme.</span></p>								</div>
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				<section class="elementor-section elementor-inner-section elementor-element elementor-element-8bf5791 elementor-section-content-bottom elementor-section-boxed elementor-section-height-default elementor-section-height-default" data-id="8bf5791" data-element_type="section">
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															<img loading="lazy" decoding="async" width="592" height="492" src="https://nanovea.com/wp-content/uploads/2021/05/Hardness-and-Young’s-modulus-of-the-polymers-NANOVEA.png" class="attachment-large size-large wp-image-11351" alt="" />															</div>
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									<p style="text-align: center;"><span class="fontstyle0" style="color: #1b96cf;">ŞEKİL 3: </span><span class="fontstyle0" style="color: #000000;">Polimerlerin sertliği ve Young modülü.</span></p>								</div>
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															<img loading="lazy" decoding="async" width="591" height="492" src="https://nanovea.com/wp-content/uploads/2021/05/Creep-depth-of-the-polymers-NANOVEA.png" class="attachment-large size-large wp-image-11349" alt="" />															</div>
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									<p style="text-align: center;"><span class="fontstyle0" style="color: #1b96cf;">ŞEKİL 4: </span><span class="fontstyle0" style="color: #000000;">Polimerlerin sürünme derinliği.</span></p>								</div>
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															<img loading="lazy" decoding="async" width="520" height="1024" src="https://nanovea.com/wp-content/uploads/2021/05/Plastic-MAterials-Testing-NANOVEA.jpg" class="attachment-large size-large wp-image-11353" alt="" />															</div>
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					<h2 class="elementor-heading-title elementor-size-default">SONUÇ</h2>				</div>
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									<p>Bu çalışmada, NANOVEA PB1000<br />Mekanik Test Cihazı, farklı polimerlerin sertlik, Young modülü ve sünme gibi mekanik özelliklerini ölçer. Bu tür mekanik özellikler, amaçlanan uygulamalar için uygun polimer malzemenin seçilmesinde esastır. Derlin ve PVC sırasıyla 0,23 ve 0,22 GPa ile en yüksek sertliği sergilerken, AYPE test edilen polimerler arasında 0,026 GPa ile en düşük sertliğe sahiptir. Genel olarak, daha sert polimerler daha düşük sürünme oranları sergilemektedir. En yumuşak AYPE, Derlin için ~120 nm'ye kıyasla 798 nm'lik en yüksek sürünme derinliğini gösterir.</p><p>NANOVEA Mekanik Test Cihazları, tek bir platformda benzersiz çok fonksiyonlu Nano ve Mikro modüller sağlar. Hem Nano hem de Mikro modüller çizik test cihazı, sertlik test cihazı ve aşınma test cihazı modlarını içerir ve tek bir sistemde mevcut olan en çılgın ve en kullanıcı dostu test yelpazesini sağlar.</p>								</div>
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					<h2 class="elementor-heading-title elementor-size-default">Benzer bir uygulamanız var mı?</h2>				</div>
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				</div><p>The post <a href="https://nanovea.com/tr/nanoindentasyon-kullanarak-polimerlerin-surunme-deformasyonu/">Creep Deformation of Polymers using Nanoindentation</a> appeared first on <a href="https://nanovea.com/tr">NANOVEA: Advanced Profilometers, Tribometers, Nanoindenters, and Scratch Testers for Materials Testing</a>.</p>
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		<title>Nanoindentasyon ile Gerilme Gevşemesi Ölçümü</title>
		<link>https://nanovea.com/tr/nanoindentasyon-kullanarak-stres-gevseme-olcumu/?utm_source=rss&#038;utm_medium=rss&#038;utm_campaign=stress-relaxation-measurement-using-nanoindentation</link>
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		<dc:creator><![CDATA[nanovea]]></dc:creator>
		<pubDate>Fri, 01 Nov 2019 14:36:23 +0000</pubDate>
				<category><![CDATA[Application Notes]]></category>
		<category><![CDATA[Indentation | Creep and Relaxation]]></category>
		<category><![CDATA[Laboratory Testing]]></category>
		<category><![CDATA[Mechanical Testing]]></category>
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					<description><![CDATA[<p>The post <a href="https://nanovea.com/tr/nanoindentasyon-kullanarak-stres-gevseme-olcumu/">Stress Relaxation Measurement using Nanoindentation</a> appeared first on <a href="https://nanovea.com/tr">NANOVEA: Advanced Profilometers, Tribometers, Nanoindenters, and Scratch Testers for Materials Testing</a>.</p>
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									<p><em><strong><u>GİRİŞ</u></strong></em></p>
<p>Viskoelastik malzemeler hem viskoz hem de elastik malzeme özelliklerine sahip olarak karakterize edilir. Bu malzemeler sabit gerilme altında zamana bağlı gerilme azalmasına (gerilme 'gevşemesi') maruz kalır ve bu da ilk temas kuvvetinde önemli bir kayba yol açar. Gerilme gevşemesi malzemenin türüne, dokusuna, sıcaklığına, ilk gerilmeye ve zamana bağlıdır. Gerilme gevşemesinin anlaşılması, belirli uygulamalar için gereken mukavemet ve esnekliğe (gevşeme) sahip optimum malzemelerin seçilmesinde kritik öneme sahiptir.</p>
<p><em><strong><u>Stres Gevşeme Ölçümünün Önemi</u></strong></em></p>
<p style="text-align: center;"><a href="https://nanovea.com/wp-content/uploads/2017/11/stress-picture.jpg"><img loading="lazy" decoding="async" class="alignnone size-full wp-image-7394" src="https://nanovea.com/wp-content/uploads/2017/11/stress-picture.jpg" alt="" width="1269" height="636"></a></p>
<p>ASTM E328i, "Malzemeler ve Yapılar için Gerilme Gevşemesi için Standart Test Yöntemleri" uyarınca, bir malzeme veya yapı üzerine önceden belirlenmiş bir maksimum kuvvete ulaşana kadar bir girinti ile harici bir kuvvet uygulanır. Maksimum kuvvete ulaşıldığında, girintinin konumu bu derinlikte sabit tutulur. Daha sonra, girintinin konumunu korumak için gerekli olan dış kuvvetteki değişiklik, zamanın bir fonksiyonu olarak ölçülür. Gerilim gevşeme testindeki zorluk, derinliği sabit tutmaktır. Nanovea Mekanik Test Cihazı'nın <a href="https://nanovea.com/nano-indentation-tester/">nanoindentasyon</a> modülü, piezo-elektrikli bir aktüatör ile derinliğin kapalı (geri besleme) döngü kontrolünü uygulayarak stres gevşemesini doğru bir şekilde ölçer. Aktüatör, derinliği sabit tutmak için gerçek zamanlı olarak tepki verirken, yükteki değişiklik son derece hassas bir yük sensörü tarafından ölçülür ve kaydedilir. Bu test, katı numune boyutu gerekliliklerine ihtiyaç duyulmadan neredeyse her tür malzeme üzerinde gerçekleştirilebilir. Ayrıca, testin tekrarlanabilirliğini sağlamak için tek bir düz numune üzerinde birden fazla test gerçekleştirilebilir</p>
<p><em><strong><u>ÖLÇÜM HEDEFI</u></strong></em></p>
<p>Bu uygulamada, Nanovea Mekanik Test Cihazının nanoindentasyon modülü, bir akrilik ve bakır numunesinin stres gevşeme davranışını ölçer. Nanovea&#039;yı sergiliyoruz <a href="https://nanovea.com/mechanical-testers/">Mekanik Test Cihazı</a> polimer ve metal malzemelerin zamana bağlı viskoelastik davranışlarını değerlendirmek için ideal bir araçtır.</p>
<p><a href="https://nanovea.com/wp-content/uploads/2017/11/measurement-objectives-png-compressed.jpg"><img loading="lazy" decoding="async" class="alignnone size-full wp-image-7381" src="https://nanovea.com/wp-content/uploads/2017/11/measurement-objectives-png-compressed.jpg" alt="" width="1109" height="739"></a></p>
<p><em><strong><u>TEST KOŞULLARI</u></strong></em></p>
<p>Bir akrilik ve bir bakır numunenin gerilme gevşemesi Nanovea Mekanik Test Cihazının nanoindentasyon modülü ile ölçülmüştür. Farklı indentasyon yükleme hızları 1 ila 10 µm/dak arasında uygulanmıştır. Hedef maksimum yüke ulaşıldığında gevşeme sabit bir derinlikte ölçülmüştür. Sabit bir derinlikte 100 saniyelik bir bekletme süresi uygulanmış ve yükteki değişim bekletme süresi geçtikçe kaydedilmiştir. Tüm testler ortam koşullarında (23 °C oda sıcaklığı) gerçekleştirilmiş ve girinti testi parametreleri Tablo 1'de özetlenmiştir.</p>
<p><a href="https://nanovea.com/wp-content/uploads/2017/11/table-1.png"><img loading="lazy" decoding="async" class="wp-image-7250 aligncenter" src="https://nanovea.com/wp-content/uploads/2017/11/table-1.png" alt="" width="761" height="121"></a></p>
<p><em><strong><u>SONUÇLAR VE TARTIŞMA</u></strong></em></p>
<p><strong>Şekil 2</strong> akrilik bir numunenin gerilme gevşemesi ölçümü sırasında zamanın bir fonksiyonu olarak yer değiştirme ve yükün gelişimini ve örnek olarak 3 µm/dak'lık bir girinti yükleme hızını göstermektedir. Bu testin tamamı üç aşamaya ayrılabilir: Yükleme, Gevşeme ve Boşaltma. Yükleme aşaması sırasında, yük kademeli olarak arttıkça derinlik doğrusal olarak artmıştır. Gevşeme aşaması maksimum yüke ulaşıldığında başlatılmıştır. Bu aşamada, cihazın kapalı geri besleme döngüsü derinlik kontrol özelliği kullanılarak 100 saniye boyunca sabit bir derinlik korunmuş ve yükün zamanla azaldığı gözlemlenmiştir. Tüm test, indenterin akrilik numuneden çıkarılması için bir boşaltma aşaması ile sonlandırılmıştır.</p>
<p style="text-align: center;"><a href="https://nanovea.com/wp-content/uploads/2017/11/figure-2.png"><img loading="lazy" decoding="async" class="wp-image-7252 aligncenter" src="https://nanovea.com/wp-content/uploads/2017/11/figure-2.png" alt="" width="570" height="445"></a></p>
<p>Aynı girinti yükleme oranları kullanılarak ancak gevşeme (sünme) süresi hariç tutularak ilave girinti testleri yapılmıştır. Bu testlerden yük ve yer değiştirme grafikleri elde edilmiş ve akrilik ve bakır numuneler için Şekil 3'teki grafiklerde birleştirilmiştir. Girinti yükleme hızı 10'dan 1 µm/dak'ya düştükçe, yük-yer değiştirme eğrisi hem Akrilik hem de Bakır için giderek daha yüksek penetrasyon derinliklerine doğru kaymıştır. Gerinimde zamana bağlı böyle bir artış, malzemelerin viskoelastik sünme etkisinden kaynaklanmaktadır. Daha düşük bir yükleme hızı, viskoelastik bir malzemenin karşılaştığı dış gerilime tepki vermesi ve buna göre deforme olması için daha fazla zamana sahip olmasını sağlar ...</p>
<p style="text-align: center;"><a href="https://nanovea.com/wp-content/uploads/2017/11/figure-3.png"><img loading="lazy" decoding="async" class="size-full wp-image-7251 aligncenter" src="https://nanovea.com/wp-content/uploads/2017/11/figure-3.png" alt="" width="541" height="816"></a></p>
<p>Farklı girinti yükleme hızları kullanılarak sabit bir gerinimdeki yükün gelişimi, test edilen her iki malzeme için Şekil 4'te çizilmiştir. Yük, testlerin gevşeme aşamasının (100 saniye tutma süresi) ilk aşamalarında daha yüksek bir oranda azalmış ve tutma süresi ~50 saniyeye ulaştığında yavaşlamıştır. Polimerler ve metaller gibi viskoelastik malzemeler, daha yüksek girinti yükleme oranlarına maruz kaldıklarında daha yüksek yük kaybı oranı sergilerler. Girinti yükleme hızı 1'den 10 µm/dak'ya yükseldikçe gevşeme sırasındaki yük kaybı oranı sırasıyla Akrilik için 51,5'ten 103,2 mN'ye ve Bakır için 15,0'dan 27,4 mN'ye yükselmiştir. <strong>Şekil 5</strong>.</p>
<p style="text-align: center;"><a href="https://nanovea.com/wp-content/uploads/2017/11/figure-4.png"><img loading="lazy" decoding="async" class="wp-image-7248 aligncenter" src="https://nanovea.com/wp-content/uploads/2017/11/figure-4.png" alt="" width="625" height="807"></a></p>
<p style="text-align: center;"><a href="https://nanovea.com/wp-content/uploads/2017/11/figure-5.png"><img loading="lazy" decoding="async" class="wp-image-7249 aligncenter" src="https://nanovea.com/wp-content/uploads/2017/11/figure-5.png" alt="" width="554" height="675"></a></p>
<p>ASTM Standardı E328ii'de belirtildiği gibi, stres gevşeme testlerinde karşılaşılan en büyük sorun, bir cihazın sabit bir gerinim/derinlik sağlayamamasıdır. Nanovea Mekanik Test Cihazı, hızlı hareket eden piezo-elektrik aktüatör ile bağımsız kapasitör derinlik sensörü arasında derinlik için kapalı bir geri besleme döngüsü kontrolü uygulayabilmesi sayesinde mükemmel doğrulukta gerilim gevşeme ölçümleri sağlar. Gevşeme aşaması sırasında piezo-elektrik aktüatör, yükteki değişim bağımsız bir yüksek hassasiyetli yük sensörü tarafından ölçülüp kaydedilirken gerçek zamanlı olarak sabit derinlik kısıtlamasını korumak için girintiyi ayarlar.</p>
<p><strong><u><i>SONUÇ</i></u></strong></p>
<p><a href="https://nanovea.com/wp-content/uploads/2017/11/img80.jpg"><img loading="lazy" decoding="async" class="alignnone wp-image-7104" src="https://nanovea.com/wp-content/uploads/2017/11/img80.jpg" alt="" width="790" height="364"></a></p>
<p>Bir akrilik ve bir bakır numunenin gerilme gevşemesi, Nanovea Mekanik Test Cihazının nanoindentasyon modülü kullanılarak farklı yükleme hızlarında ölçülmüştür. Yükleme sırasında malzemenin sünme etkisi nedeniyle daha düşük yükleme hızlarında girintiler yapıldığında daha büyük bir maksimum derinliğe ulaşılır. Hem akrilik hem de bakır numune, hedeflenen maksimum yükteki girinti konumu sabit tutulduğunda gerilme gevşemesi davranışı sergilemektedir. Daha yüksek girinti yükleme oranlarına sahip testler için gevşeme aşaması sırasında yük kaybında daha büyük değişiklikler gözlenmiştir.</p>
<p>Nanovea Mekanik Test Cihazı tarafından üretilen stres gevşeme testi, cihazların polimer ve metal malzemelerin zamana bağlı viskoelastik davranışını ölçme ve güvenilir bir şekilde ölçme yeteneğini sergilemektedir. Tek bir platform üzerinde eşsiz çok fonksiyonlu Nano ve Mikro modüllere sahiptir. Nem ve sıcaklık kontrol modülleri, çok çeşitli endüstrilere uygulanabilen çevresel test yetenekleri için bu cihazlarla eşleştirilebilir. Hem Nano hem de Mikro modüller çizik testi, sertlik testi ve aşınma testi modlarını içerir ve tek bir sistemde mevcut olan en geniş ve en kullanıcı dostu mekanik test yetenekleri yelpazesini sağlar.</p>								</div>
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				</div><p>The post <a href="https://nanovea.com/tr/nanoindentasyon-kullanarak-stres-gevseme-olcumu/">Stress Relaxation Measurement using Nanoindentation</a> appeared first on <a href="https://nanovea.com/tr">NANOVEA: Advanced Profilometers, Tribometers, Nanoindenters, and Scratch Testers for Materials Testing</a>.</p>
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