|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||J-81: Compositional Effects of Stacking Fault Energies in Ni-based FCC Concentrated Alloys
||Liubin Xu, Luis Casillas-Trujillo, Yanfei Gao, Haixuan Xu
|On-Site Speaker (Planned)
The stacking fault energy (SFE) is a crucial material property that is closely linked to dislocation and planar faults in face-centered cubic (fcc) materials. To understand the complex deformation mechanisms in concentrated alloys, such as medium/high entropy alloys, we investigate the SFEs in several Ni-based binary concentrated alloys (e.g. NiCo, NiCu, and NiFe) with fcc structure using both atomistic simulations and density functional theory (DFT) calculations. We have identified distinguished trends of SFEs vs. alloy compositions and the observed trends can’t be explained by simply extending the dilute-alloy model. To reveal the physical origin of these trends, data analysis toolkits are employed to correlate the SFEs with other fundamental materials properties. Electronic and magnetic contributions to the SFEs are discussed by comparing the atomistic simulations and DFT results. This research provides fundamental insights of compositional effects on mechanical properties of materials that was not included in conventional alloy theories.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume