About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Advances in Multi-Principal Element Alloys III: Mechanical Behavior
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Presentation Title |
Phase Transformation and Deformation Behavior in a B2-base High-entropy Alloy |
Author(s) |
Rui Feng, You Rao, Chuan Zhang, Maryam Ghazisaeidi, Peter Liaw, Ke An |
On-Site Speaker (Planned) |
Rui Feng |
Abstract Scope |
Ordered intermetallic compounds have long been of interest as potential structural materials for use at elevated temperatures. In particular, B2 aluminides exhibit a wide range of interesting properties, such as high ordering temperature, corrosion resistance, and pseudo-elasticity effect. However, the lack of room-temperature ductility limits their applications due to an insufficient number of independent slip systems and poor grain-boundary (GB) cohesion. Recently, ductile multicomponent intermetallics have been achieved by the high-entropy alloy (HEA) concept. Here we design a B2-base HEA with a minor ductile face-centered-cubic (FCC) phase as a GB adhesive phase. The improved slip capability and stress-induced martensitic transformation of the multicomponent B2 phase are evidenced by in-situ neutron diffraction and transmission-electron microscopy. Together with the GB-strengthener, the tensile ductility of the designed alloy is enhanced to some extent. This work offers insights into alloy-design strategies that could improve the ductility of intermetallic alloys and accelerate their engineering applications. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Mechanical Properties, Characterization |