|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Entropy Alloys VI
||True Thermodynamic Equilibrium in High Entropy Alloys: Al0.3CoCrFeNi as a Case Study (Invited)
||Bharat Gwalani, Vishal Soni, Deep Choudhuri, Stephane Gorsse, Rajarshi Banerjee
|On-Site Speaker (Planned)
While high entropy alloys (HEAs) have attracted a lot of attention, the predominant focus on single-phase microstructures for these alloys represents a serious limitation in terms of achieving a balance of properties for many applications. Furthermore, often the experimentally observed single-phase HEA is the result of second-phase-precipitation constrained by thermodynamic and kinetic factors. This raises some fundamental questions regarding the notion of true thermodynamic equilibrium in HEAs as a function of temperature. This presentation will focus on using Al0.3CoCrFeNi as a candidate HEA, to investigate second-phase-precipitation as a function of different thermo-mechanical treatments. In terms of second-phase-precipitation, the focus will be the competition between the thermodynamic driving force and activation barrier for nucleation in this alloy, coupled with the kinetics of the process. While the parent matrix phase for this HEA is an FCC solid-solution phase, controlled thermo-mechanical treatments can lead to precipitation of multiple strengthening phases in this alloy.
||Planned: Supplemental Proceedings volume