|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XV
||Tuning Metallic Glass Characteristics via Manipulating Icosahedral Order and Packing Density
||Geunhee Yoo, Eunsoo Park, Ke-Fu Yao, Chaewoo Ryu, Jungsoo Lee, JiaLun Gu
|On-Site Speaker (Planned)
Icosahedral ordering, which has forbidden five-fold symmetry, shows extraordinary properties in metallic glasses. Icosahedral short-range order (ISRO) is known for stabilizing supercooled liquid and main building block of amorphous solid. Moreover, icosahedral medium-range order (IMRO) in metallic glasses, the atomic model of interpenetrating icosahedra, significantly affects mechanical properties such as plasticity. Many researches and simulations show relation between IMRO and plasticity in metallic glasses. However, there is little research about the relationship between microstructural variation with different degree of icosahedral ordering and mechanical responses through systemic change of composition. In the present study, we will report the variation of microstructure and mechanical responses of Ti-Zr-Ni alloys by systemically controlling Be contents. Through these attempts, we can carefully figure out the role of icosahedral ordering and packing density on their properties, and finally suggest an effective strategy for enhancing both glass-forming ability (GFA) and ductility in bulk metallic glass (BMG)-forming alloys.
||Planned: Supplemental Proceedings volume