Correlation between plasticity and other materials properties of Cu-Zr bulk metallic glasses: An atomistic simulation study
- Correlation between plasticity and other materials properties of Cu-Zr bulk metallic glasses: An atomistic simulation study
- 강경한; 박경원; 이재철; 에릭플러리; 이병주
- Plasticity; Cu-Zr; Bulk metallic glasses; Atomistic simulation
- Issue Date
- Acta materialia
- VOL 59, NO 2, 805-811
- The correlation between experimentally observed plasticity and various materials properties that have been mentioned as being
related to the mechanical properties of bulk metallic glasses (BMGs) has been investigated for Cu–Zr binary BMG alloys using a molecular
dynamics simulation. Most of the properties examined show a roughly comparable correlation with plasticity, but the accuracy is
not sufficient to be used for alloy design. The pentagon fraction obtained from a Voronoi polygon analysis and atomic displacement
during plastic deformation directly computed using the atomistic approach can be selected as quantities that have an acceptable correlation
with plasticity, even though the clearness and the statistical stability are unsatisfactory. The fractional volume change of mixing is
proposed as a new materials property that shows a clear and statistically stable correlation with plasticity, and its physical origin as a tool
to estimate the plasticity of and to design BMG alloys with improved plasticity is discussed.
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