Interactions between dislocations and three-dimensional annealing twins in face centered cubic metals

Authors

Yanxiang Liang, University of Nebraska–Lincoln
Xiaofang Yang, Chongqing UniversityFollow
Mingyu Gong, University of Nebraska–LincolnFollow
Guisen Liu, Shanghai Jiao Tong University
Qing Liu, Chongqing University
Jian Wang, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

3-2019

Citation

Published in Computational Materials Science 161 (2019), pp 371–378.

doi 10.1016/j.commatsci.2019.02.024

Comments

Copyright © 2019 Elsevier B.V. Used by permission.

Abstract

Annealing twins often form in metals with a face centered cubic structure during thermal and mechanical processing. Here, we conducted molecular dynamic (MD) simulations for copper and aluminum to study the interaction processes between {1 1 1}1/2 <1 1 0> dislocations and a three-dimensional annealing twin. Twin boundaries are characterized with Σ3{1 1 1} coherent twin boundaries (CTBs) and Σ3{1 1 2} incoherent twin boundaries (ITBs). MD results revealed that dislocation-ITB interactions affect slip transmission for a dislocation crossing CTBs, facilitating the nucleation of Lomer dislocation.