|About this Abstract
||3rd World Congress on High Entropy Alloys (HEA 2023)
||Phase-field Simulation of Phase Separation in MPEAs
||Kamalnath Kadirvel, Weisheng Cao, Shuanglin Chen, Yunzhi Wang, Shalini Roy Koneru, Fan Zhang
|On-Site Speaker (Planned)
MPEAs (Multi Principal Element Alloys) owing to the compositional complexity can have convoluted phase transformation pathways (PTPs). Understanding these PTPs is critical for tailoring the microstructure for specific engineering applications. We utilized the recently developed phase-field simulation tool (called PanPhasefield, https://computherm.com/panphasefield ) that efficiently couples with CALPHAD databases for thermodynamic and kinetic data to simulate the spinodal decomposition in MPEAs. We studied kinetics of phase separation in Fe-Co-Mn-Ni-Cu alloy system using PanHEA database. Interestingly, the partitioning of Ni and Mn is much slower compared to other elements in the early stages of decomposition despite their relatively high atomic mobilities. However, at the later stages of decomposition, the concentration modulations of Ni and Mn were comparable to those of other elements such as Fe and Co. Simulated results were in qualitative agreement with experiments. Independent thermodynamic calculations were also performed to decouple the effect of free energy and atomic mobility.
||Planned: Metallurgical and Materials Transactions