主催: 一般社団法人 日本機械学会
会議名: M&M2017 材料力学カンファレンス
開催日: 2017/10/07 - 2017/10/09
In order to investigate the effects of hydrogen gas pressure and temperature on fatigue crack growth characterizations of low carbon steel JIS-SM490B and low alloy steel JIS-SCM435, fatigue crack growth tests using a CT specimen were conducted in pressurized gaseous hydrogen in various temperature. In low-pressure hydrogen gas, the fatigue crack growth rate was decreased with increasing of temperature. On the other hand, in high-pressure hydrogen gas, the fatigue crack growth rate was not depending on temperature. The mechanism of fatigue crack growth under hydrogen environment with various temperature and pressure was discussed based on the theory of dislocation trapping of hydrogen.
