Microstructure and Properties of ZTA15 Titanium Alloy in Different States

Author of the article:HAN Yunfei1,2, YUAN Bingbing1,2, SUN Bing1,2, LIU Yihui1,2, QIAO Haibin1,2, LI Bobo1,2

Author's Workplace：1. Luoyang Sunrui Titanium Precision Casting Co., Ltd., Luoyang 471000, China; 2. No. 725 Research Institute, China State Shipbuilding Gorporation Limited, Luoyang 471000, China

Key Words：ZTA15 titanium alloy; microstructure; mechanical property; hot isostatic pressing; annealing

Abstract：ZTA15 titanium alloy bar was prepared by investment precision casting technology. The microstructure and tensile properties of ZTA15 titanium alloy under different conditions such as-cast state, annealing state, hot isostatic pressing state, and hot isostatic pressing+annealing state were studied. The results show that the microstructure of TA15 titanium alloy in four states is composed of α and β phases, the as-cast microstructure is not uniform, there is residual stress, and the distribution of mechanical property data is discrete. The microstructure of annealed state, hot isostatic pressing state, and hot isostatic pressing +annealing state gradually tends to be uniform, and the needle-like α phase coarsenes into sheets, and the mechanical property data are distributed in a centralized manner. Hot isostatic pressing + annealing has the highest uniformity of microstructure and properties, and the highest concentration of mechanical property data distribution, which is the best use state.