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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Continuous Phase Transformations
Presentation Title Phase-Field Modelling of Transformation Pathways and Microstructural Evolution in MPEAs (Multi Principle Element Alloys)
Author(s) Kamalnath Kadirvel, Jacob K Jensen, Rajarshi Banerjee, Hamish Fraser, Yunzhi Wang
On-Site Speaker (Planned) Kamalnath Kadirvel
Abstract Scope 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.
Proceedings Inclusion? Planned:
Keywords High-Entropy Alloys, Phase Transformations, Computational Materials Science & Engineering

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Cluster variation model of phase behavior in Heusler-forming alloy systems.
Competitive Partitioning and Decomposition Evolution in Nanocrystalline Alloys
Cross-Slip and Work-Hardening in Short-Range Ordered FCC Alloys
Effect of bulk and local phase transformation on deformation mechanisms
Interfacial Spinodals
Intrinsic phase stability and continuous phase transformations in TiAlZrN ultra-hard nitride coatings
Magnetically Driven Short-Range Order in the CrCoNi System
Microstructural engineering of Ni-based superalloys processed by conventional and additive manufacturing
Phase-Field Modelling of Transformation Pathways and Microstructural Evolution in MPEAs (Multi Principle Element Alloys)
Phase competition in the two steps continuous phase transformation during solidification of Terbium
Short-range clustering and ordering evolution of Ni-22Cr-13Mo alloy
Structural transformations driven by irradiation in the high defect density limit.
Study of Precipitation Behavior of High-Cr Ni-based Filler Metals using In-situ S/TEM
Thermodynamics of the Invar Transition: Phonons vs. Magnetism

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