On the atomic anisotropy of thermal expansion in bulk metallic glass
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Date
2011-02-03
Journal Title
Journal ISSN
Volume Title
Publisher
Australian Institute of Physics
Abstract
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 in the thermal expansion behavior of 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 local shear stresses. 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.
Description
Keywords
Alloys, Thermal expansion, Metallic glasses, X-ray diffraction, Synchrotrons, Anisotropy, Stresses, Zirconium, Copper, Nickel, Aluminium
Citation
Liss, K.-D., Qu, D. D., Reid, M., & Shen, J. (2011). On the atomic anisotropy of thermal expansion in bulk metallic glass. Poster presented to the Australian and New Zealand Institutes of Physics 35th Annual Condensed Matter and Materials Meeting, Charles Sturt University, Wagga Wagga, NSW, 2nd - 4th February, 2011. Retrieved from: https://physics.org.au/wp-content/uploads/cmm/2011/