The effect of cold deformation on structure and deformation induced phase transformations in quenched (α+β)-alloys of transition class

Abstract

The order of deformation β→τ→α′ (VT22 alloy) and βrarr;α″→α′ (Ti-10-2-3 alloy) phase transformations taking place during cold deformation of metastable β-solid solution has been established. Crystallogeometrical model of mentioned above transformations was proposed. The martensitic phases (τ,α", α′) generated during cold plastic deformation were shown to have a limited angles range between close-packed directions in close-packed plane. The angle between close-packed directions was shown to change in step sequence during phase transformation. Morphology features of formed structure under different deformation ratios were considered.