Hydrogen absorption behavior of TA15 alloy

Xue-ping Ren1), Fang-fang Zhang2), Qing-miao Guo3), Hong-liang Hou4), and Yao-qi Wang4) 1) School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China 2) Zhejiang Special Equipment Inspection and Research Institute, Hangzhou 310015, China 3) General Research Institute for Nonferrous Metals, Beijing 100088, China 4) Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China

摘 要：The hydrogen absorption kinetics of TA15 titanium alloy at 973-1123 K was studied using a tube-type hydrogen treatment furnace. The hydrogen absorption kinetic curves obtained were analyzed according to a series of mechanism equations to reveal the kinetic parameters and mechanism of the hydrogen absorption process. The results show that both the hydrogen absorption rate and the equilibrium hydrogen pressure increase and the time to reach equilibrium is shortened with increasing temperature. It is found that only the second hydrogen absorption period exists in the hydrogen absorption process of TA15 alloy between 973 and 1123 K, and the activation energy is 54.889 kJ/mol for hydrogen absorption. X-ray diffraction （XRD） and scanning electron microscopy （SEM） results demonstrate that δ hydride forms between 973 and 1123 K, and β phase decreases with the increase of temperature. Orthorhombic α" martensite is generated at 1073-1123 K, and their amount increases with increasing temperature.

关键词：