Stress-dependent dislocation core structures leading to non-Schmid behavior

Di Qiu; Pengyang Zhao; Dallas R. Trinkle; Yunzhi Wang

doi:10.1080/21663831.2020.1854359

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Stress-dependent dislocation core structures leading to non-Schmid behavior

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- Stress-dependent dislocation core structures leading to non-Schmid behavior
- Stress-dependent dislocation core structures leading to non-Schmid behavior
- 材料研究快报（英文） 2021年9卷第3期页码：134-140
- 作者机构：
  
  1. a Materials Genome Institute Shanghai University
  2. b Department of Engineering Mechanics School of Naval Architecture Ocean & Civil Engineering Shanghai Jiao Tong University Shanghai China
  3. d Materials Science and Engineering Department University of Illinois Urbana
  4. c Department of Materials Science and Engineering The Ohio State University Columbus
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2020.1854359
  中图分类号：
- 网络首发：2020-12-18，
  
  纸质出版：2021
- 稿件说明：
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Di Qiu, Pengyang Zhao, Dallas R. Trinkle, 等. Stress-dependent dislocation core structures leading to non-Schmid behavior[J]. 材料研究快报（英文）, 2021,9(3):134-140.

Di Qiu, Pengyang Zhao, Dallas R. Trinkle, et al. Stress-dependent dislocation core structures leading to non-Schmid behavior[J]. Materials Research Letters, 2021, 9(3): 134-140.
Di Qiu, Pengyang Zhao, Dallas R. Trinkle, 等. Stress-dependent dislocation core structures leading to non-Schmid behavior[J]. 材料研究快报（英文）, 2021,9(3):134-140. DOI： 10.1080/21663831.2020.1854359.

Di Qiu, Pengyang Zhao, Dallas R. Trinkle, et al. Stress-dependent dislocation core structures leading to non-Schmid behavior[J]. Materials Research Letters, 2021, 9(3): 134-140. DOI： 10.1080/21663831.2020.1854359.

摘要

Abstract

The stress-dependent core structures of dislocations for basal slip in magnesium are calculated using

ab initio

generalized stacking fault energy surface and microscopic phase-field method. The dissociation of dislocation cores exhibits the dependence on the non-shear component in the stress tensor; the Peierls stress is found to either become virtually zero or increase by an order of magnitude

depending on the applied shear stress magnitude and direction. The results

in contrast to the classical Schmid's law for crystal plasticity

are explained using the Escaig stress concept and the resulting implication on plastic deformation is discussed.

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相关机构

d Institute of Materials Intelligent Technology Liaoning Academy of Materials

c School of Materials Science and Engineering Taiyuan University of Science and Technology

a School of Materials Science and Engineering MOE jointly Collaborative Innovation Center for High-performance Al/Mg based Materials Shanxi Key Laboratory of Intelligent Casting and Advanced Forming for New Materials North University of China Taiyuan People’s Republic of China

b Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology Beijing Beijing People’s Republic of China

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