|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIII
||Local Structure Orders in Metallic Liquids and Glasses and Their Influence on the Phase Selection
||Cai-Zhuang Wang, Yue Zhang, Feng Zhang, Yang Sun, Zhou Ye, Kai-Ming Ho, M. I. Memdelev, M. J. Kramer
|On-Site Speaker (Planned)
Accurate description of atomic structures of undercooled metallic liquids and glasses are vital to accurately study the atomistic mechanisms that influence phase selections. By combining adaptive genetic algorithm, cluster alignment, molecular dynamics simulation and experimental synthesis and characterization, we have developed an integrated approach to identify and quantify the short- and medium-range orders in metallic liquids and glasses. Using this approach, we can identify not only local structure order well beyond the first atomic shell (e.g., Cu64.5Zr35.5), but also dominate non-icosahedral motifs in the disordered metallic alloys (e.g., Al90Sm10). We showed that the short- and medium-range orders in undercooled metallic liquids are strongly dependent on the cooling rate. We also demonstrated that the phase selection and transformation pathways are critically influenced by the structure motifs in the undercooled liquids.
Supported by US-DOE under Contract No. DE-AC02-07CH11358.
||Planned: A print-only volume