https://doi.org/10.1051/epjconf/201818303013
Probe Embryonic Damage Evolution in Bulk Metallic Glasses under Plate-impact Loading
1
LNM, Institute of Mechanics, Chinese Academy of Sciences,
Beijing
100190,
China
2
ISE, China Academy of Engineering Physics,
Mianyang
621999,
P.R. China
* Corresponding author: lingz@lnm.imech.ac.cn
Published online: 7 September 2018
Microdamage in very short stress durations of spallation process in Zr-based bulk metallic glass (Zr-BMG) samples were captured by a specially designed plate impact technique. With stress durations vary, microdamage “frozen” in Zr-BMG samples exhibited different damage levels. Based on the morphology and stress environment of the microdamage, a compound microdamage evolution mode is applied to characterize the spallation evolution in Zr-BMGs. Especially the spallation in BMGs originates from cavitation instabilities in the weak regions with higher free volume content, which results in formation of ductile damage zones. The activation of shear transformation zones (STZs) or tension transformation zones (TTZs) between these ductile damage zones finally leads to detached spallation.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
