About this Abstract |
Meeting |
2nd World Congress on High Entropy Alloys (HEA 2021)
|
Symposium
|
2nd World Congress on High Entropy Alloys (HEA 2021)
|
Presentation Title |
Phase Field Modeling of Transformation Pathways in
Multi-phase HEAs |
Author(s) |
Kamalnath Kadirvel, Jacob Jensen, Zachary Kloenne, Hamish Fraser, Sang Jun Kim, Eun Soo Park, Yunzhi Wang, Shalini Roy Koneru |
On-Site Speaker (Planned) |
Shalini Roy Koneru |
Abstract Scope |
Multi-phase HEAs has gained a lot of interest owing to its excellent high temperature properties. It is crucial to understand the phase transformation pathways (PTPs) in these alloys in order to tailor their microstructures for desired properties. In this work, we investigated various possible PTPs in HEAs whose microstructures consist of B2 and bcc phases through phase-field modelling, including order-disorder transitions, conditional spinodal decomposition, and precipitation by nucleation and growth. We systematically investigated the effects of volume fractions of individual phases, lattice misfit and modulus mismatch between the phases and the free energy curves of the individual phases on the PTPs and two-phase microstructures. A microstructure map is created that will assist in multi-phase HEA microstructure design through adjusting alloy composition and heat-treatment schedule. This work is supported by AFOSR under grant FA9550-20-1-0015. |
Proceedings Inclusion? |
Undecided |
Keywords |
Additive Manufacturing, Ceramics |