Room-temperature compressive properties of TC21 alloy processed by thermohydrogen treatment at 1123 K

作者：Yuan, Baoguo; Tang, Aichuang; Qian, Deguo; Chen, Qiang^*; Zhang, Xiaoxue; Huang, Zhongyue

来源：International Journal of Hydrogen Energy, 2022, 47(59): 25066-25079.

DOI：10.1016/j.ijhydene.2022.05.234

• Titanium alloy
• Thermohydrogen treatment
• Microstructure
• Compressive property

The influence of hydrogen level on compressive properties of TC21 alloy processed by thermohydrogen treatment (THT) at 1123 K was studied through room-temperature compression experiments. The microstructures of TC21 alloy processed by THT at 1123 K were investigated by OM, XRD, and TEM. Results showed that hydrogen level affected apparently the microstructures and compressive properties of TC21 alloy processed by THT at 1123 K. With increasing level of hydrogen, the yield strength of TC21 alloy decreased to a minimum initially and then increased; the deformation limit of TC21 alloy decreased slightly to a minimum first, then increased to a maximum, and ultimately decreased. At a hydrogen level of 0.78 wt%, the deformation limit of TC21 alloy was the highest among all THT-processed TC21 alloys and showed an increase of 244.33% compared with the original TC21 alloy.