Tailoring phase composition of a multielement TiZrAlV alloy via electroplastic rolling

Abstract

• Effect of strain on electroplastic deformed ZrTiAlV alloy was studied. • Martensitic transformation of Ti alloy can be regulated by electroplastic rolling. • Increasing strain enhances the stress-induced martensite transformation and improves the strength. • The optimal mechanical properties of UTS ∼1398 MPa and ε f ∼ 5.77% were obtained at strain 2.28. The TiZrAlV alloy were deformed by electroplastic rolling with strains from e ∼ 1.31 to 2.70, which led to the phase transformation from β phase to α phase and α phase to α˝ phase. The contents of various phases were tailored by rolling strain. As a result, the deformed alloy exhibited an increasing ultimate tensile strength (1286 MPa to 1398 MPa) and failure elongation (4.05% to 5.77%) from e ∼ 1.31 to 2.28. Further increasing the strain to e ∼ 2.70 led to a further increase in strength and a loss in ductility, 1484 MPa and 3.73%. Our work provides an alternative process to improve the mechanical properties of Ti alloys by tailoring various phase compositions and phase transformations.