1. School of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048, China
2. Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China
The effect of rolling temperature on the tensile and creep properties of Ti650 alloy was studied. The effects of different rolling temperatures on the morphology and content of equiaxed α phase and secondary α phase were analyzed by optical microscope. EBSD analysis technique was used to characterize the crystal orientation of Ti650 alloy after rolling. The results show that with the increase of rolling temperature, the strength of Ti650 alloy increases gradually, and the plasticity changes little. Primary α phase, secondary α phase and texture all affect the tensile properties of Ti650 alloy. The high temperature creep properties of Ti650 alloy are related to the content and size of primary α phase and the thickness of secondary α phase lamellar. The residual creep strain shows a trend of increasing first and then decreasing with the increase of rolling temperature, and the creep performance is the best when rolling at 1000 ℃．