Protium Absorption Properties of Ti-Cr-V-Mn Alloys in Low Pressure Regions

The present study aims to investigate the effects of addition of Mn to Ti–Cr–V alloys on their protium absorption properties and to find the design criteria for increasing effective protium capacity. The effects of V and Mn content of the alloys on the protium absorption properties of heat-treated Ti–Cr–V–Mn alloys in low pressure regions were studied at various temperatures, and it was found that increasing Mn content and decreasing V content unstabilize protoride in low pressure region. The PCT curves from low pressure plateau region (10−1–105 Pa) to high pressure plateau region (105–107 Pa) shifted to the side of low protium concentration. It was found that the addition of Mn or decreasing V content in the alloys is effective for increasing effective protium capacity.