Deformation behaviors under tension and compression: Atomic simulation of Cu65Zr35 metallic glass

Title
Deformation behaviors under tension and compression: Atomic simulation of Cu65Zr35 metallic glass
Authors
박경원에릭플러리석현광김유찬
Keywords
Glasses, metallic; Brittleness and ductility; Fracture mode; Yield stress; Simulations, atomistic
Issue Date
2011-08
Publisher
Intermetallics
Citation
VOL 19, NO 8, 1168-1173
Abstract
To clarify the difference in the plasticity of metallic glasses observed experimentally under tension and compression, the changes in the structural state induced during the deformation of Cu65Zr35 glassy alloy were analyzed by means of molecular dynamics (MD) simulation. Although mechanical responses were distinct, no clear difference was detected in the change in the short-range order of the deformed structures, except for the intensive collapse of the (0,3,6,4) bonding in the elastic regime seen in the extended sample. To explain the difference in the plasticity and particularly the brittleness of bulk metallic glass (BMG) in the tensile mode, we examine the degree of strain localization and discuss the role of normal stress on the activation of shear transformation zones (STZs) during tension and compression in the elastic regime.
URI
http://pubs.kist.re.kr/handle/201004/39785
ISSN
0966-9795
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KIST Publication > Article
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