Strain localization in annealed Cu50Zr50 metallic glass
- Strain localization in annealed Cu50Zr50 metallic glass
- 박경원; 박호건; 에릭플러리
- Amorphous alloy; Annealing; SRO structural change; Strain localization; Energy absorption
- Issue Date
- Materials science & engineering. A, Structural materials : properties, microstructure and processing
- VOL 528, NO 16-17, 5319-5326
- A molecular dynamics simulation technique was used to investigate the atomic structural changes in
Cu50Zr50 metallic glass during isothermal annealing, with the aim of clarifying the mechanism responsible
for the reduction of the plasticity experimentally observed during uniaxial loading of heat-treated
Cu50Zr50. The atomic strain during shear deformation was calculated for the as-cast and annealed samples
to evaluate the degree of strain localization, which affects the global plasticity of the alloys. The
validity of the normalized relaxation heat parameter used to evaluate the degree of strain localization
has been verified during elastostatic compression. The variation of the potential energy in the elastic
regime, which was found to be correlated to the degree of strain localization, is proposed as parameter
to evaluate by computational simulation the ability of an amorphous alloy to deform plastically.
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