A crystal plasticity model for metal matrix composites considering thermal mismatch stress induced dislocations and twins

Abstract Originated at heterogeneous interfaces with distinct coefficient of thermal expansion (CTE), thermal mismatch stress is one of the critical influential factors to mechanical properties of metal matrix composites (MMCs). This stress is normally accommodated plastically by various defects, fo...

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Autores principales:	Y. N. Hou, K. M. Yang, J. Song, H. Wang, Y. Liu, T. X. Fan
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d4d4b2ae21c344b3b1e37f72a4c857da
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spelling	oai:doaj.org-article:d4d4b2ae21c344b3b1e37f72a4c857da2021-12-02T17:06:25ZA crystal plasticity model for metal matrix composites considering thermal mismatch stress induced dislocations and twins10.1038/s41598-021-95439-z2045-2322https://doaj.org/article/d4d4b2ae21c344b3b1e37f72a4c857da2021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-95439-zhttps://doaj.org/toc/2045-2322Abstract Originated at heterogeneous interfaces with distinct coefficient of thermal expansion (CTE), thermal mismatch stress is one of the critical influential factors to mechanical properties of metal matrix composites (MMCs). This stress is normally accommodated plastically by various defects, for example, high-density dislocations and twins in Al near heterogeneous interfaces in SiC/Al composites. Basic knowledge on the influence of defect characteristics is important but difficult to extrapolate from experimental results. However, existed theoretical models more focus on the influence of dislocation density, but less focus on defects variety, volume and distribution. In this paper, we propose a physics-based crystal plasticity model that has the capability of dealing with thermal mismatch stress induced dislocations and twins (denoted as TMDT model). The proposed TMDT model that is implemented in the Visco-Plastic Self-Consistent (VPSC) method considers defect heterogeneous distribution (gradient range), defect type (dislocations vs. twins) and defect volume fraction (twin spacing vs. twin volume). We demonstrate the validity and the capability of the VPSC-TMDT model in SiC/Al composites with thermal mismatch induced dislocations or twins. Furthermore, this model predicts the ultra-high strength of Graphene/Copper composites with high-density nanoscale twins, which is in turn the future aim for such nanocomposites.Y. N. HouK. M. YangJ. SongH. WangY. LiuT. X. FanNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Y. N. Hou K. M. Yang J. Song H. Wang Y. Liu T. X. Fan A crystal plasticity model for metal matrix composites considering thermal mismatch stress induced dislocations and twins
description	Abstract Originated at heterogeneous interfaces with distinct coefficient of thermal expansion (CTE), thermal mismatch stress is one of the critical influential factors to mechanical properties of metal matrix composites (MMCs). This stress is normally accommodated plastically by various defects, for example, high-density dislocations and twins in Al near heterogeneous interfaces in SiC/Al composites. Basic knowledge on the influence of defect characteristics is important but difficult to extrapolate from experimental results. However, existed theoretical models more focus on the influence of dislocation density, but less focus on defects variety, volume and distribution. In this paper, we propose a physics-based crystal plasticity model that has the capability of dealing with thermal mismatch stress induced dislocations and twins (denoted as TMDT model). The proposed TMDT model that is implemented in the Visco-Plastic Self-Consistent (VPSC) method considers defect heterogeneous distribution (gradient range), defect type (dislocations vs. twins) and defect volume fraction (twin spacing vs. twin volume). We demonstrate the validity and the capability of the VPSC-TMDT model in SiC/Al composites with thermal mismatch induced dislocations or twins. Furthermore, this model predicts the ultra-high strength of Graphene/Copper composites with high-density nanoscale twins, which is in turn the future aim for such nanocomposites.
format	article
author	Y. N. Hou K. M. Yang J. Song H. Wang Y. Liu T. X. Fan
author_facet	Y. N. Hou K. M. Yang J. Song H. Wang Y. Liu T. X. Fan
author_sort	Y. N. Hou
title	A crystal plasticity model for metal matrix composites considering thermal mismatch stress induced dislocations and twins
title_short	A crystal plasticity model for metal matrix composites considering thermal mismatch stress induced dislocations and twins
title_full	A crystal plasticity model for metal matrix composites considering thermal mismatch stress induced dislocations and twins
title_fullStr	A crystal plasticity model for metal matrix composites considering thermal mismatch stress induced dislocations and twins
title_full_unstemmed	A crystal plasticity model for metal matrix composites considering thermal mismatch stress induced dislocations and twins
title_sort	crystal plasticity model for metal matrix composites considering thermal mismatch stress induced dislocations and twins
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d4d4b2ae21c344b3b1e37f72a4c857da
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_version_	1718381641247752192

A crystal plasticity model for metal matrix composites considering thermal mismatch stress induced dislocations and twins

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