Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8004315 | Journal of Iron and Steel Research, International | 2017 | 7 Pages |
Abstract
By means of statistical analysis, the deformation mechanisms taking place in elastic loading and plastic shearing stages during serrated flows on the stress-strain curves for bulk metallic glasses were studied comprehensively. Normalized serration number presented a linear increasing tendency with the decrease of applied strain rates due to the reduction of free volumes. An excellent plastic deformation was illustrated from the influences of structure arrangement with activation energy. By using mean-field theory (MFT), maximum elastic-energy density at different strain rates could be predicted by MFT besides maximum stress drops during serrations. These results were helpful for understanding the serrated flow behavior or designing decent schemes to improve the plasticity of bulk metallic glasses at room temperature.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Bo Yuan, Jiao-jiao Li, Jun-wei Qiao,