Deformation behaviors under tension and compression: Atomic simulation of Cu65Zr35 metallic glass
- Deformation behaviors under tension and compression: Atomic simulation of Cu65Zr35 metallic glass
- 박경원; 에릭플러리; 석현광; 김유찬
- Glasses, metallic; Brittleness and ductility; Fracture mode; Yield stress; Simulations, atomistic
- Issue Date
- VOL 19, NO 8, 1168-1173
- 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.
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- KIST Publication > Article
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