Mechanical & Materials Engineering, Department of

 

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.

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