Ultra-High Strength and Specific Strength in Ti₆₁Al₁₆Cr₁₀Nb₈V₅ Multi-Principal Element Alloy: Quasi-Static and Dynamic Deformation and Fracture Mechanisms.

ABSTRACT: This study investigates the deformation and fracture mechanisms of a Ti₆₁Al₁₆Cr₁₀Nb₈V₅ multi-principal element alloy (Ti61V5 alloy) under quasi-static and dynamic compression. The alloy comprises an equiaxed BCC matrix (~35 μm) with uniformly dispersed nano-sized B2 precipitates and a ~3.5% HCP phase along grain boundaries, exhibiting a density of 4.82 g/cm³, an ultimate tensile strength of 1260 MPa, 12.8% elongation, and a specific strength of 262 MPa·cm³/g. The Ti61V5 alloy exhibits a pronounced strain-rate-strengthening effect, with a strain rate sensitivity coefficient (m) of ~0.0088 at 0.001-10/s. Deformation activates abundant {011} and {112} slip bands in the BCC matrix, whose interactions generate jogs, di

SUBMITTER: He YY 

PROVIDER: S-EPMC12298045 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature