| About this Abstract |
| Meeting |
2016 TMS Annual Meeting & Exhibition
|
| Symposium
|
Bulk Metallic Glasses XIII
|
| Presentation Title |
Designed Heterogeneities Improve the Fracture Reliability of a Zr-based Bulk Metallic Glass |
| Author(s) |
Jamie J. Kruzic, Bosong Li, Hamed Shakur Shahabi, Sergio Scudino, Jürgen Eckert |
| On-Site Speaker (Planned) |
Jamie J. Kruzic |
| Abstract Scope |
Although notched toughness values tend to be consistently high, bulk metallic glasses (BMGs) have been reported to have large variability in pre-cracked mode I fracture toughness that might be attributed, in part, to variations in the as-cast BMG structure. In this study, alternating soft and hard regions were created in a Zr52.5Ti5Cu18Ni14.5Al10 (at.%) BMG via mechanical imprinting at room temperature. Similar to other recent studies, only 50% of as-cast samples demonstrated plastic deformation during pre-cracked mode I fracture tests. In contrast, 100% of imprinted samples demonstrated measurable plasticity, there was an apparent increase in mean toughness, and the scatter in measured mode I fracture toughness was significantly reduced. Overall, these results support the notion that structural differences in as-cast BMGs contribute to the scatter in toughness. Furthermore, mechanical treatments show promise for improving the fracture reliability of BMGs. |
| Proceedings Inclusion? |
Planned: A print-only volume |