Abstract
The fracture behavior of a Zr-based bulk amorphous metal under impact loading using subsize V-shaped Charpy specimens was investigated. Influences of loading rate on the fracture behavior of amorphous Zr-Al-Ni-Cu alloy were examined. As a result, the maximum load and absorbed fracture energy under impact loading were lower than those under quasi-static loading. A large part of the absorbed fracture energy in the Zr-based BMG was consumed in the process for crack initiation and not for crack propagation. In addition, fractographic characteristics of BMGs, especially the initiation and development of shear bands at the notch tip were investigated. Fractured surfaces under impact loading are smoother than those under quasi-static loading. The absorbed fracture energy appeared differently depending on the appearance of the shear bands developed. It can be found that the fracture energy and fracture toughness of Zr-based BMG are closely related with the extent of shear bands developed during fracture.
| Original language | English |
|---|---|
| Pages (from-to) | 4359-4364 |
| Number of pages | 6 |
| Journal | International Journal of Modern Physics B |
| Volume | 20 |
| Issue number | 25-27 |
| DOIs | |
| State | Published - 30 Oct 2006 |
Keywords
- Bulk amorphous metal
- Fractography
- Instrumented charpy impact test
- Loading rate
- Subsize charpy specimen