Deformation Behaviors in Single BCC-Phase Refractory Multi-Principal Element Alloys under Dynamic Conditions.

ABSTRACT: The mechanical behavior and microstructural evolution of a BCC-phase NbTaTiV refractory multi-principal element alloy (RMPEA) is studied over a wide range of strain rates (10^-3 to 10³ s^-1) and temperatures (room temperature to 850 °C). The mechanical property of present RMPEA shows less strain-rate dependence and strong resistance to softening at high temperatures. Under high strain-rate loading, the formation of thin type-I twins is observed, which could lead to an increase in strain-hardening rates. However, this hardening mechanism competes with adiabatic heating effects, resulting in the deterrence of strain-hardening behaviors. In contrast, substantial strain-hardening occurs at cryogenic temperatures due to the formation of twins, which act as stronge

SUBMITTER: Lee C 

PROVIDER: S-EPMC12463061 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature