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Correlation between internal states and plasticity in bulk metallic glass

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9 Author(s)
Tan, J. ; Materials Science and Engineering College, Chongqing University, 400030 Chongqing, People''s Republic of China ; Zhang, Y. ; Sun, B.A. ; Stoica, M.
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We report a close correlation between the internal states and plasticity in a bulk metallic glass (BMG) and discover that the optimization of copper-mold casting current can induce large plasticity stably in an otherwise brittle BMG. It is possible to confirm that larger plasticity corresponds to the internal states with more average free volume (FV) as revealed by lower density, higher enthalpy change, and higher Poisson’s ratio. The enhanced plastic deformation mechanism is interpreted based on the FV model of BMGs, and our results may have some implications for understanding the role of the FV during plastic deformation of BMGs.

Published in:

Applied Physics Letters  (Volume:98 ,  Issue: 15 )

Date of Publication:

Apr 2011

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