Mechanical behavior and hardening characteristics of a superplastic Ti-6AI-4V alloy

摘要: The deformation behavior of a superplastic Ti-6A1-4V alloy at 927°C has been characterized by means constant strain-rate tensile tests up to large plastic strain. Significant hardening recorded in the course deformation. Microstructural studies on deformed samples indicate occurrence simultaneous induced grain growth, which explains nearly all hardening. A small amount may also be expected from elongation or clustering effects. As result concurrent sensitivity is found decrease with strain, thus indicating that stress-strain rate determined initially not applicable after amounts stressJstrain-rate data obtained step test for variety sizes, together growth kinetics plots, provide developing constitutive description this material strains.