|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||Phase Stability in Refractory High Entropy Alloys
||German D Samolyuk, Yuri Osetsky, G. Malcolm Stocks, James R. Morris
|On-Site Speaker (Planned)
||James R. Morris
The configurational entropy associated with multiple components of nearly equiatomic composition give rise to the phrase “high entropy alloys,” and is clearly associated with the phase stability of observed single-phase materials. The expression for the ideal entropy of mixing, however, does not reflect the crystal structure. We present a density functional theoretical exploration of phase stability and competing crystal structures in medium and high entropy alloys formed of group IV and V elements. We find that a particular role of configurational disorder may determine the crystal structure, even at low temperatures where entropic considerations are minimal. Phase stability and other properties associated with the ground state structure are presented, across a number of alloy compositions.
This work is supposed by the Department of Energy’s Office of Science, through the Energy Dissipation to Defect Evolution EFRC (GDS, YO and GMS), and through the Materials Science and Engineering Division (JRM).
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume