|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Continuous Phase Transformations
||Phase-Field Modelling of Transformation Pathways and Microstructural Evolution in MPEAs (Multi Principle Element Alloys)
||Kamalnath Kadirvel, Jacob K Jensen, Rajarshi Banerjee, Hamish Fraser, Yunzhi Wang
|On-Site Speaker (Planned)
MPEAs (Multi Principle Element Alloys) with multiple phases have very good structural and functional properties like high specific strength, high corrosion resistance, high yield strength, superconductivity and irradiation resistance. The recently developed refractory alloy AlMo0.5NbTa0.5TiZr shows an interesting microstructure with ordered phase (B2) being the precipitate and disordered phase (A2) being the matrix unlike the conventional Ni-based superalloys where we observe the ordered phase (γ') to be the precipitate and disordered phase be the matrix (γ). It becomes crucial to understand the transformation pathways leading to these microstructures in these alloys in order to tailor the microstructure for specific engineering applications. We proposed a transformation pathway for the MPEA, AlMo0.5NbTa0.5TiZr, which has superior mechanical properties, and employed phase-field method to simulate the microstructure evolution following the proposed transformation pathways. The simulation results are compared with experimental observations. The work is supported by AFOSR under grant FA9550-20-1-0015.
||High-Entropy Alloys, Phase Transformations, Computational Materials Science & Engineering