|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIV
||Structural Stabilities and Mechanical Responses of Ni-transition Metal Binary Glass-forming Alloys
||Hehsang Ahn, Jinwoo Kim, Soyeon Kim, Eun Soo Park
|On-Site Speaker (Planned)
Ni-based metallic glasses are attractive candidates for structural applications since they exhibit outstanding thermal and mechanical properties. Ni successfully forms an amorphous structure upon alloying with other transition metals (TMs), and glass-forming Ni-TM binary alloys have similar compositions regardless of the kind of TMs. Since glass forming ability (GFA) is closely related to an atomic structure, this unique composition ratio is expected to play a key role in achieving a structure favorable for vitrification. Although the consistent composition ratio is required for enhanced GFA in each system, GFA diverges greatly according to TMs. To understand the correlation between structural stabilities and GFA, we investigated mechanical responses through nanoindentation test on different Ni-TM metallic glasses prepared by melt-spinning. We statistically analyzed the distribution of shear avalanches thereby characterizing amorphous structures in the aspect of topological fluctuations. These results could provide effective guidelines for an alloy design by tailor-made atomic structure control.
||Planned: Supplemental Proceedings volume