|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||High Entropy Alloys IV
||Deformation and Structural Modeling of a Quenched Al0.1CrCoFeNi Multi-principal Element Alloy under High Strains
||Aayush Sharma, Peter K. Liaw, Ganesh Balasubramanian
|On-Site Speaker (Planned)
The structural and deformation characteristics of a quenched multi-principal element-Al0.1CrCoFeNi at high strain rates are different from conventional alloys and even different from the as-cast materials of similar elemental configurations. Our results from deterministic molecular dynamics suggest that the formation process greatly determines the structural ordering in these multi-principal systems. Loading mechanisms acting on such alloys also governs the final structural form of the deformed structure in the Al0.1CrCoFeNi high-entropy alloy system. As a result of quick quenching and localized melting, the deformation mechanism transforms a solidified liquid structure under compression to a face-centered-cubic (FCC) lattice. However, under tensile loads, the material deforms, while maintaining its original solidified liquid structure. Analyzing engineering stress-strain curves reveals that the thermo-plastic instability leads to extended strain softening at different temperatures for the Al0.1CrCoFeNi HEA system, which is largely responsible for the FCC structural ordering observed only during compressive loading of these materials.
||Planned: A print-only volume