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Indexed by:期刊论文

Date of Publication:2014-12-15

Journal:SCRIPTA MATERIALIA

Included Journals:SCIE、EI

Volume:93

Page Number:12-15

ISSN No.:1359-6462

Key Words:Cyclic indentation; Crack; Nanotwinned deformation; CdTe; Molecular dynamics

Abstract:The surface energies of monocrystalline (mc) and nanotwinned (nt) cadmium telluride (CdTe or CT) crystals, calculated using molecular dynamics simulations, are 435.08 and 381.8 mJ m(-2), respectively. A crack of mc-CT is induced at the second loading cycle, whereas nt-CT with both twin boundaries (TBs) shows a crack at the lower TB under the third unloading condition. However, nt-CT with three TBs is free from cracks after 10 cyclic loading unloading indentations, due to the combined effect between the hardening and softening nanotwins. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.