Penny-shaped crack propagation in spallation of Zr-BMGs
1 LNM, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, PR China
2 Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621900, PR China
a Corresponding author: email@example.com
Published online: 7 September 2015
Typical penny-shaped microcracks at their propagating in spallation of Zr-based bulk metallic glass (Zr-BMG) samples were captured by a specially designed plate impact technique. Based on the morphology and stress environment of the microcrack, a damaged zone or propagation zone around the crack tips, similar to the cohesive zone in classical fracture theories, is applied. Especially the scale of such a damaged zone represents a scale of the crack propagation. Its fast propagation would quickly bring a longer crack or cause cracks coalesce to form another longer one. The estimated propagation scales of microcracks are reasonable compared with what occurred in the Zr-BMG samples.
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