| Abstract Scope |
Refractory multi-principal element alloys (RMPEAs) have garnered significant attention for their distinctive alloy design strategies and exceptional mechanical properties. In this study, we introduce a novel Ti50-xV25Nb25Mox (x = 0, 3, 6, 9) alloy, which exhibits a balanced enhancement of both strength and plasticity through strategic composition optimization and subsequent recrystallization, effectively overcoming the typical strength-ductility trade-off in metallic alloys. The Mo6 alloy demonstrates a low density of 6.1 g/cm³, with a yield strength of approximately 645 MPa and a room-temperature tensile elongation of 9.3%. Mo6-1100°C/1h exhibits superior mechanical properties, with a yield strength of approximately 710 MPa and an elongation of 21.5%. The alloy’s microstructure and deformation mechanisms were extensively studied, revealing a complex evolution of dislocation substructures, involving dislocation loops, tangles, bands, and cells, as well as the formation of kink bands. |