Abstract:
Effect of deformation rate on microstructure and tensile property of cold rolled Ti-3Al-2.5V alloy tubes were studied. The microstructure was observed by optical microscope and tensile properties were evaluated with a tensile tester. The result shows that the microstructure of cold rolling Ti-3Al-2.5V alloy tube is bacillary structure and the crystal preferred orientation becomes more and more significant with the increasing cold rolling deformation rate. The tensile strength increase a little but the strain remarkably decreased with the cold rolling deformation rate increasing from 30% to 70%. The temperature of 750℃ is the recrystallization temperature and the microstructure of the tube fully recoveries to an equilibrium state. The experimentally measured recrystallization temperature is in accord with the calculated value. The results are important to develop the high performance Ti-3Al-2.5V alloy tubes and to stabilize the production process.