Effect of strain on microstructural development during uniaxial compression of metastable beta Ti-10V-2Fe-3Al alloy

Abstract The effect of strain during uniaxial compression on mechanical behavior of Ti–10V–2Fe–3Al alloy produced by blended elemental powder metallurgy and containing a metastable β matrix with ~0.1 fraction of α phase was investigated. A detailed scanning transmission electron microscopy study revealed the initiation of slip and deformation-induced α′′ martensite and ωD formation at the beginning of plastic deformation in the stress plateau region of stress-strain curve. {332} twinning occurred at a later stage. Deformation-induced ωD formed in the β matrix and within {332} twins, but was consumed by other deformation products at strains exceeding 0.2. Formation of {112} twins within {332} twins and along their interfaces with the matrix was uncovered. The rate of development of deformation products among the β phase grains was non-uniform with many being fully transformed to α′′ martensite by 0.4 strain, whereas others experienced deformation conditions related to stress plateau region (