About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Bulk Metallic Glasses XVII
|
Presentation Title |
The Effect of Thermal and Mechanical Cycling on Atomic Structure and Fracture Toughness of Metallic Glasses |
Author(s) |
Jittisa Ketkaew, Sebastian A. Kube, Derek Kuldinow, Rui Yamada, Hui Wang, Wojciech Dmowski, Takeshi Egami, Jan Schroers |
On-Site Speaker (Planned) |
Jittisa Ketkaew |
Abstract Scope |
Recently, thermal cycling was discovered as a means to rejuvenate metallic glasses, leading to a glass of higher energy, which is often associated with improved mechanical properties such as plasticity and ductility. Despite numerous studies carried out, the underlying mechanism leading to rejuvenation is still unclear. We present a systematic study of the effect of thermal cycling between the room and cryogenic temperatures and mechanical cycling with maximum load comparable to the yield strength on the fracture toughness for Zr44Ti11Cu10Ni10Be25 and Pd43Cu27Ni10P20 BMGs of various glassy states quantified by their fictive temperatures. Our study reveals that both thermal and mechanical cycling results in a non-monotonic behavior, and in addition to the rejuvenation, relaxation occurs in some cases as a consequence of both cycling methods. We will discuss similarities and differences contribution that thermal and mechanical have on the microscopic changes of BMGs which leads to the effects on fracture toughness. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |