Internal stress-induced melting below melting temperature at high-rate laser heating Hwang, Yong Levitas, Valery Levitas, Valery
dc.contributor.department Aerospace Engineering
dc.contributor.department Ames Laboratory
dc.contributor.department Mechanical Engineering
dc.contributor.department Materials Science and Engineering 2018-02-19T01:49:48.000 2020-06-29T22:46:23Z 2020-06-29T22:46:23Z Wed Jan 01 00:00:00 UTC 2014 2014-01-01
dc.description.abstract <p>In this Letter, continuum thermodynamic and phase field approaches (PFAs) predicted internal stress-induced reduction in melting temperature for laser-irradiated heating of a nanolayer. Internal stresses appear due to thermal strain under constrained conditions and completely relax during melting, producing an additional thermodynamic driving force for melting. Thermodynamic melting temperature for Al reduces from 933.67 K for a stress-free condition down to 898.1 K for uniaxial strain and to 920.8 K for plane strain. Our PFA simulations demonstrated barrierless surface-induced melt nucleation below these temperatures and propagation of two solid-melt interfaces toward each other at the temperatures very close to the corresponding predicted thermodynamic equilibrium temperatures for the heating rate Q≤1.51×1010K/s" role="presentation" style="display: inline; line-height: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px 2px 0px 0px; margin: 0px; position: relative;">Q≤1.51×1010K/sQ≤1.51×1010K/s. At higher heating rates, kinetic superheating competes with a reduction in melting temperature and melting under uniaxial strain occurs at 902.1 K for <em>Q</em> = 1.51 × 1011 K/s and 936.9 K for <em>Q</em> = 1.46 × 1012 K/s.</p>
dc.description.comments <p>This article is published as Hwang, Yong Seok, and Valery I. Levitas. "Internal stress-induced melting below melting temperature at high-rate laser heating." <em>Applied Physics Letters</em> 104, no. 26 (2014): 263106. doi: <a href="" target="_blank">10.1063/1.4886799</a>. Posted with permission.</p>
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dc.identifier.articleid 1106
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dc.language.iso en
dc.source.bitstream archive/|||Sat Jan 15 02:37:58 UTC 2022
dc.source.uri 10.1063/1.4886799
dc.subject.disciplines Aerospace Engineering
dc.subject.disciplines Structures and Materials
dc.title Internal stress-induced melting below melting temperature at high-rate laser heating
dc.type article
dc.type.genre article
dspace.entity.type Publication
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