About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Multi-Principal Element Alloys III: Mechanical Behavior
|
Presentation Title |
Twinning-controlled Deformation Behavior of a MoReW Equimolar Alloy |
Author(s) |
Oleg N. Senkov, Satish I. Rao, Glenn H. Balbus, Robert Wheeler, Todd M. Butler |
On-Site Speaker (Planned) |
Glenn H. Balbus |
Abstract Scope |
Microstructure and mechanical properties of an equiatomic MoReW alloy, which has demanding combination of strength and ductility in the temperature range of 25°C to 1200°C, are reported. The alloy has a weak temperature dependence of yield stress resulting in remarkably good yield stress retention at high temperatures, and it shows strong strain hardening. Extensive deformation twinning occurred from the beginning of deformation and activation of other deformation modes at later deformation stages in this temperature range. To understand and explain the observed behaviors of the alloy, detailed analyses of strengthening mechanisms associated with screw and edge dislocation glide, as well as with twin nucleation, propagation and multiplication, have been conducted and reasonable qualitative models of yielding, strain hardening and ductility of the studied MoReW alloy have been proposed. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Temperature Materials, Mechanical Properties, Characterization |