About this Abstract |
Meeting |
2nd World Congress on High Entropy Alloys (HEA 2021)
|
Symposium
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2nd World Congress on High Entropy Alloys (HEA 2021)
|
Presentation Title |
Determination of Transformation Pathways and Microstructural Evolution in Multi-principal Element Alloys using Coupled Materials Characterization and Phase Field Modeling |
Author(s) |
Hamish L. Fraser, Zachary Kloenne, Kamalnath Kadirvel, Jean-Philippe Couzinie, Jacob Jensen, Yunzhi Wang |
On-Site Speaker (Planned) |
Hamish L. Fraser |
Abstract Scope |
A recently developed refractory MPEA, AlMo0.5NbTa0.5TiZr, exhibits an interesting microstructure with an ordered B2 phase being the matrix and a disordered bcc phase being the precipitate, unlike the conventional Ni-based superalloys where the ordered phase (𝛾′) is the precipitate and the disordered phase is the matrix (γ). Specific heat-treatments have been employed which have been designed to yield mechanistic details of the phase transformation pathway leading to the final microstructure. Based on these experiments, it appears that the pathway includes conditional spinodal decomposition, phase separation, and congruent ordering and disordering transformations. These experimental results are being used to develop a phase field model of the phase transformation pathway of this alloy, and this model is being employed to provide predictions of heat-treatments that will result in optimized microstructures. The progress made will be presented at the conference. |
Proceedings Inclusion? |
Undecided |