Grain Boundary Motion under Dynamic Loading: Mechanism and Large-Scale Molecular Dynamics Simulations

Christian Brandl; Timothy C. Germann; Alejandro G. Perez-Bergquist; Ellen K. Cerreta

doi:10.1080/21663831.2013.830993

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Grain Boundary Motion under Dynamic Loading: Mechanism and Large-Scale Molecular Dynamics Simulations

Original Reports | 更新时间：2026-08-19

- Grain Boundary Motion under Dynamic Loading: Mechanism and Large-Scale Molecular Dynamics Simulations
- Grain Boundary Motion under Dynamic Loading: Mechanism and Large-Scale Molecular Dynamics Simulations
- 材料研究快报（英文） 2013年1卷第4期页码：220-227
- 作者机构：
  
  1. Theoretical Division Los Alamos National Laboratory Los Alamos
  2. Materials Science & Technology Division Los Alamos National Laboratory Los Alamos
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2013.830993
  中图分类号：
- 网络首发：2013-09-18，
  
  纸质出版：2013
- 稿件说明：
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Christian Brandl, Timothy C. Germann, Alejandro G. Perez-Bergquist, 等. Grain Boundary Motion under Dynamic Loading: Mechanism and Large-Scale Molecular Dynamics Simulations[J]. 材料研究快报（英文）, 2013,1(4):220-227.

Christian Brandl, Timothy C. Germann, Alejandro G. Perez-Bergquist, et al. Grain Boundary Motion under Dynamic Loading: Mechanism and Large-Scale Molecular Dynamics Simulations[J]. Materials Research Letters, 2013, 1(4): 220-227.
Christian Brandl, Timothy C. Germann, Alejandro G. Perez-Bergquist, 等. Grain Boundary Motion under Dynamic Loading: Mechanism and Large-Scale Molecular Dynamics Simulations[J]. 材料研究快报（英文）, 2013,1(4):220-227. DOI： 10.1080/21663831.2013.830993.

Christian Brandl, Timothy C. Germann, Alejandro G. Perez-Bergquist, et al. Grain Boundary Motion under Dynamic Loading: Mechanism and Large-Scale Molecular Dynamics Simulations[J]. Materials Research Letters, 2013, 1(4): 220-227. DOI： 10.1080/21663831.2013.830993.

摘要

Abstract

Grain boundaries (GBs) are not static structures during shock loading

despite the short timescales. We present a mechanistic explanation for why non-coherent Σ 3 GBs are particularly mobile

due to their consisting of coherent twin boundaries every third (111) glide plane

separated by incoherent twin boundary segments with three Shockley partial dislocations that can readily glide into either grain. Asymmetric GBs with such structures can thus move in response to the elastic driving force provided by uniaxial compression. We present large-scale molecular dynamic simulations that illustrate this mechanism

which explains the Σ 3 GB faceting recently observed in shock-recovered copper multi-crystals.

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相关机构

e Materials Research Institute The Pennsylvania State University University Park

d Department of Nuclear Engineering The Pennsylvania State University University Park PA USA

b Department of Engineering Science and Mechanics The Pennsylvania State University University Park PA USA

d Department of Nuclear Engineering The Pennsylvania State University University Park

c Department of Mechanical Engineering University of Michigan Ann Arbor

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