Journal
ADVANCED ENGINEERING MATERIALS
Volume 13, Issue 9, Pages 861-864Publisher
WILEY-BLACKWELL
DOI: 10.1002/adem.201000349
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Funding
- Australian Synchrotron Research Program
- Commonwealth of Australia under the National Collaborative Research Infrastructure Strategy
- National Natural Science Foundation of China [51025415, 50771040, 10732010]
- U.S. Department of Energy [DE-AC02-06CH11357]
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Glass transition temperature and plastic yield strength are known to be correlated in metallic glasses. We have observed by in situ synchrotron high energy X-ray diffraction anisotropy of the thermal expansion behavior in the nearest neighbor and second nearest neighbor atomic distances in the building blocks of Zr-Cu-Ni-Al based bulk metallic glass, leading inevitably to shear. Mechanical yielding of the latter on the atomic scale leads to the glass transition and the increase of the free volume. These experimental results uncover the mechanism, how glass transition and yield strength are linked.
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