Effect of Quasi-Hydrostatic Pressure on Deformation Mechanism in Ti-10Mo Alloy

Abstract

The deformation mechanisms of Ti-10Mo (wt.%) alloy subjected to different quasi-hydrostatic pressure values were investigated under constrained compression using stage of high-pressure torsion apparatus. Deformation products contain {332} mechanical twinning, stress-induced α″ martensitic phase and stress-induced ω phase. A volume expansion accompanied stress-induced α″ martensitic phase transformation is 2.06%. By increasing the applied pressure from 2.5 GPa to 5 GPa, the dominant deformation mechanism underwent a transition from stress-induced α″ martensitic phase transformation to {332} mechanical twinning.

Keywords

• titanium alloys
• quasi-hydrostatic pressure
• deformation structure
• martensitic phase transformation
• twinning