|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XV
||Effects of Annealing and Irradiation on the Mechanical and Microstructural Properties of Bulk Metallic Glass Alloys
||Jamieson Brechtl, Miguel Crespillo, Hui Wang, Tengfei Yang, Luis Mora, Yanwen Zhang, Hongbin Bei, Yongqiang Wang, Joerg Neuefeind, Wojciech Dmowski, Takeshi Egami, Peter K. Liaw, Steven J. Zinkle
|On-Site Speaker (Planned)
Bulk metallic glasses (BMGs), which are advanced potentially irradiation-resistant materials, are composed of a topologically disordered structure which prohibits the creation of Frenkel pair defects. However, there are still many unanswered questions regarding how irradiation displacement damage affects their mechanical and microstructural properties. For this study, microstructural analysis and mechanical tests were performed on as-cast, annealed, and irradiated Zr52.5Cu17.9Ni14.6Al10Ti5 (BAM-11) and Cu60Zr20Hf10Ti10 BMGs. The samples were irradiated by 5-9 MeV C or Ni ions (midrange doses of 0.5 and 10 dpa) or neutrons (0.1 dpa) at temperatures ranging from ambient to ~360 oC. Nanoindentation and in situ compression tests found that heat treatment and primary knock-on damage led to significant changes in short-range ordering and mechanical properties. Furthermore, neutron diffraction experiments revealed that neutron irradiation led to disordering while annealing led to structural relaxation in BAM-11. In addition to the above, the results of helium diffusion experiments will be discussed.
||Planned: Supplemental Proceedings volume