Atomistic mechanisms of cyclic hardening in metallic glass

Author(s)
Deng, Chuang; Schuh, Christopher A.
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Abstract
Molecular dynamics with an embedded-atom method potential is used to simulate the nanoindentation of Cu[subscript 63.5]Zr[subscript 36.5] metallic glasses. In particular, the effects of cyclic loading within the nominal elastic range on the overall strength and plasticity of metallic glass are studied. The simulated results are in line with the characteristics of experimentally observed hardening effects. In addition, analysis based on local von Mises strain suggests that the hardening is induced by confined microplasticity and stiffening in regions of the originally preferred yielding path, requiring a higher applied load to trigger a secondary one.
Date issued
2012-06
URI
http://hdl.handle.net/1721.1/79774
Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Journal
Applied Physics Letters
Publisher
American Institute of Physics (AIP)
Citation
Deng, Chuang, and Christopher A. Schuh. “Atomistic mechanisms of cyclic hardening in metallic glass.” Applied Physics Letters 100, no. 25 (2012): 251909. © 2012 American Institute of Physics
Version: Final published version
ISSN
00036951
1077-3118
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