Super-plasticity via secondary twinning in magnesium nanowire revealed by molecular dynamics simulations

C Ni and H Ding and XJ Jin, COMPUTATIONAL MATERIALS SCIENCE, 111, 163-174 (2016).

DOI: 10.1016/j.commatsci.2015.09.016

We have explored the secondary twinning contribution to the ductility of the magnesium nanowire using molecular dynamics simulations. An ultrahigh 60% elongation is presented in < 11 (2) over bar0 >-oriented nanowires during tensile deformation as result of primary and sequential secondary twinning processes. Crystallographic and stress field analyses identify the dominant contribution from the formation and procreation of (1) over bar(1) over bar 21 mode secondary twin to the elongation. Our results provide new insight of improving structural alloy ductility through twining-induced plasticity at the nanoscale. (C) 2015 Elsevier B.V. All rights reserved.

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