|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XV
||Influence of Composition on Glass Formation and Structure in Zr-Al-Ni Alloys
||Juan Wang, Peter Tsai, Anupriya Agrawal, Katharine Flores
|On-Site Speaker (Planned)
We apply a high-throughput laser deposition-based synthesis technique to study glass formation in the Zr-Ni-Al system. Glass formation was found over a wide compositional range centered on Zr54.7Ni23.9Al21.4. Compositional trends in nanoindentation hardness and modulus were also measured, and correlations with glass forming ability will be discussed. The atomic-level structural evolution during cooling was explored in the same system via molecular dynamics simulations. The compositional range of simulated glass formation was in excellent agreement with experimental results. Furthermore, the simulations revealed transitional compositions where glass-crystalline composites were consistently observed. This enabled a detailed study of liquid structure and atomic cluster formation and their role in crystal nucleation. Compositional trends in the variance of cluster types at high temperature were established within the simulated glass and composite forming regions. Glass forming ability was higher in compositions with low variance.
||Planned: Supplemental Proceedings volume