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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Recent Investigations and Developments of Titanium-containing High Entropy Alloys
Presentation Title Evolution of Microstructure and Deformation Substructure in Al1 Mo0.5 Nb1Ta0.5Ti1Zr1, a Refractory HEA Alloy with Disordered BCC Precipitates Embedded in a Continuous Ordered B2 Matrix
Author(s) Gopal Babu Viswanathan, Jean-Philippe Couzinie, Zachary T. Kloenne, Brian A. Welk, Oleg N. Senkov, Hamish L. Fraser
On-Site Speaker (Planned) Gopal Babu Viswanathan
Abstract Scope The introduction of refractory elements in the high-entropy concept has led to the design of complex alloys with body centered cubic (BCC) microstructure with the aim to develop new materials with enhanced mechanical properties at high temperature. In particular, the ordered B2 phase in the BCC matrix has been highly sought in the case of refractory compositions with the aim to mimic the g-g’ type microstructure obtained in Ni-based superalloys. In alloy Al1 Mo0.5 Nb1Ta0.5Ti1Zr1 in this study the microstructure is however inverted compared to Ni-based superalloys with a B2 matrix and BCC precipitates embedded in it. To this end, the current study will focus on describing first the concomitant formation of fine scale microstructure leading to BCC+B2 microstructures with strong analogy to Ni-based superalloys and second, the characterization of defects in the plastic zone beneath the nano-indentation at RT.
Proceedings Inclusion? Planned: None Selected
Keywords High-Entropy Alloys,


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