| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Entropy Alloys IX: Alloy Development and Properties
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| Presentation Title |
Mechanical Properties of Precipitation Strengthened Refractory High Entropy Alloys at Elevated Temperatures |
| Author(s) |
Stephan Laube, Steven Schellert, Daniel Schliephake, Alexander Kauffmann, Bronislava Gorr, Hans-Jürgen Christ, Martin Heilmaier |
| On-Site Speaker (Planned) |
Stephan Laube |
| Abstract Scope |
Solid solution strengthening in A2 or B2 refractory complex concentrated alloys is very likely not sufficient to achieve suitable high-temperature strength and creep resistance for potential high-temperature applications. Strengthening phases need to be introduced by proper alloy design and suitable heat-treatments. A two-phase microstructure with coherent cuboidal precipitates can be stabilized in the AlMoNbTaTiZr system [Senkov et al., JOM (2014)]. However, it is crucial to embed the B2 strengthening phase in an A2 matrix to maintain the ductility of the alloy at lower temperatures. This talk will summarize our recent findings on the development of alloys similar in microstructure within the AlCrMoTaTi system. Thermodynamic calculations assisted the down selection of alloys. These alloys, produced by arc melting and subsequent homogenization heat-treatment, were investigated by transmission electron diffraction and calorimetric techniques. Mechanical properties were characterized by compression tests at elevated temperatures and discussed in the light of the present microstructures. |
| Proceedings Inclusion? |
Planned: |