The effect of loading strain rates on deformation behavior of Cu/Fe composite

ZJ Lin and WW Pang and K Xin and XT Feng and FX Yin, PHYSICS LETTERS A, 388, 127070 (2021).

DOI: 10.1016/j.physleta.2020.127070

The effect of loading strain rates on deformation behavior of Cu/Fe composite are studied via molecular dynamics. Both yield stress and flow stress increase with increasing strain rates. In initial plastic stage, dislocations originate from long-strip structure on the interface when strain rate is lower. However, new dislocations also nucleate at the junction lines of two long-strip structures when strain rate is higher. Furthermore, the long dislocation lines are divided into necklace-like dislocation segments and further harden composite. In later plastic stage, tetrahedral structures and point defects form in Cu and Fe layer with lower strain rate, respectively. (C) 2020 Elsevier B.V. All rights reserved.

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