多晶塑性和晶界演化:基于位错的扩散界面方法

Junyang He, N. Admal
{"title":"多晶塑性和晶界演化:基于位错的扩散界面方法","authors":"Junyang He, N. Admal","doi":"10.13140/RG.2.2.28625.45923","DOIUrl":null,"url":null,"abstract":"Grain structure plays a key role in the mechanical properties of alloy materials. Engineering the grain structure requires a comprehensive understanding of the evolution of grain boundaries (GBs) when a material is subjected to various manufacturing processes. To this end, we present a computationally efficient framework to describe the co-evolution of bulk plasticity and GBs. We represent GBs as diffused geometrically necessary dislocations, whose evolution describes GB plasticity. Under this representation, the evolution of GBs and bulk plasticity can be described in unison using the evolution equation for the plastic deformation gradient, an equation central to classical crystal plasticity theories. In addition, we outline a method to introduce a synthetic potential to drive migration of a flat GB within our diffuse-interface framework. We validate the framework by simulating the evolution of a triple junction, and demonstrate its computational efficiency. We further leverage this framework to study the migration of a flat GB driven by a potential difference, subject to different sets of available slip systems and mechanical boundary conditions.","PeriodicalId":8467,"journal":{"name":"arXiv: Materials Science","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2021-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Polycrystal plasticity and grain boundary evolution: A unified dislocation-based diffuse-interface approach\",\"authors\":\"Junyang He, N. Admal\",\"doi\":\"10.13140/RG.2.2.28625.45923\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Grain structure plays a key role in the mechanical properties of alloy materials. Engineering the grain structure requires a comprehensive understanding of the evolution of grain boundaries (GBs) when a material is subjected to various manufacturing processes. To this end, we present a computationally efficient framework to describe the co-evolution of bulk plasticity and GBs. We represent GBs as diffused geometrically necessary dislocations, whose evolution describes GB plasticity. Under this representation, the evolution of GBs and bulk plasticity can be described in unison using the evolution equation for the plastic deformation gradient, an equation central to classical crystal plasticity theories. In addition, we outline a method to introduce a synthetic potential to drive migration of a flat GB within our diffuse-interface framework. We validate the framework by simulating the evolution of a triple junction, and demonstrate its computational efficiency. We further leverage this framework to study the migration of a flat GB driven by a potential difference, subject to different sets of available slip systems and mechanical boundary conditions.\",\"PeriodicalId\":8467,\"journal\":{\"name\":\"arXiv: Materials Science\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2021-02-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"arXiv: Materials Science\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.13140/RG.2.2.28625.45923\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv: Materials Science","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.13140/RG.2.2.28625.45923","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

摘要

晶粒组织对合金材料的力学性能起着关键作用。工程晶粒结构需要对晶界(GBs)的演变有全面的了解,当材料受到各种制造工艺。为此,我们提出了一个计算效率高的框架来描述体塑性和gb的共同演化。我们将GB表示为扩散的几何必要位错,其演化描述了GB塑性。在这种表示下,可以用塑性变形梯度演化方程(经典晶体塑性理论的核心方程)来统一描述GBs和体塑性的演化。此外,我们还概述了一种方法,该方法引入了一种综合潜力,以在我们的扩散接口框架内驱动平面GB的迁移。我们通过模拟三结点的演化来验证该框架,并证明了其计算效率。我们进一步利用这一框架来研究由电位差驱动的平面GB的迁移,受不同可用滑移系统和机械边界条件的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Polycrystal plasticity and grain boundary evolution: A unified dislocation-based diffuse-interface approach
Grain structure plays a key role in the mechanical properties of alloy materials. Engineering the grain structure requires a comprehensive understanding of the evolution of grain boundaries (GBs) when a material is subjected to various manufacturing processes. To this end, we present a computationally efficient framework to describe the co-evolution of bulk plasticity and GBs. We represent GBs as diffused geometrically necessary dislocations, whose evolution describes GB plasticity. Under this representation, the evolution of GBs and bulk plasticity can be described in unison using the evolution equation for the plastic deformation gradient, an equation central to classical crystal plasticity theories. In addition, we outline a method to introduce a synthetic potential to drive migration of a flat GB within our diffuse-interface framework. We validate the framework by simulating the evolution of a triple junction, and demonstrate its computational efficiency. We further leverage this framework to study the migration of a flat GB driven by a potential difference, subject to different sets of available slip systems and mechanical boundary conditions.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信