| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Entropy Alloys IX: Alloy Development and Properties
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| Presentation Title |
Temperature Dependent Deformation Behavior and Strengthening Mechanisms in a Two-phase BCC+B2 Refractory High Entropy Alloy |
| Author(s) |
Oleg N. Senkov, Jean-Philippe Couzinie, Satish I Rao, Vishal Soni, Rajarshi Banerjee |
| On-Site Speaker (Planned) |
Oleg N. Senkov |
| Abstract Scope |
Microstructure, room temperature and elevated temperature mechanical properties of a refractory high entropy alloy Al10Nb15Ta5Ti30Zr40 will be reported. The homogenized and continuously cooled (water quenching or air cooling) conditions of this alloy consist of a nanoscale mixture of a disordered BCC and an ordered B2 phases, while subsequent low temperature annealing treatment leads to the formation of additional phases. Despite the multi-phase microstructure, the alloy has excellent room temperature ductility and yield stress of 1050 MPa. With increasing temperature, the yield stress decreases to 852 MPa at 400°C but then increases to 1059 MPa at 600°C. Above 600°C, the yield stress decreases rapidly with increasing temperature becoming 250 MPa at 800°C and less than 50 MPa at 1000°C and 1200°C. Correlations between the mechanical properties and microstructure, as well as temperature-dependent operating strengthening mechanisms, will also be discussed. |
| Proceedings Inclusion? |
Planned: |