발간논문

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Vol.47, No.11, 773 ~ 786, 2009
Title
Plasticity of Amorphous Alloys: 2. Inhomogeneous Deformation
박경원 Kyoung Won Park , 이창면 Chang Myeon Lee , 이재철 Jae Chul Lee
Abstract
Studies of a number of Cu-Zr amorphous alloys have demonstrated that those exhibiting greater plastic strain during homogeneous deformation at room temperature show lower global plasticity associated with inhomogeneous deformation in a typical compression test. Using a combination of experiments and molecular dynamics simulations, we clarify this seeming paradox between the homogeneous and inhomogeneous deformation by exploring the microstructural aspects in view of the structural disordering, disorder-induced softening, and shear localization and relate these findings to the global plasticity of bulk amorphous alloys. Additional analyses were conducted to derive a simple structural parameter that allows the prediction of the global plasticity of bulk amorphous alloys.
Key Words
amorphous alloy, free volume, inhomogeneous deformation, shear Localization, plasticity
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