抄録
Fatigue crack growth behavior of a V and Mo added carbon steel was investigated in 0.1-90 MPa hydrogen gas at room temperature. The carbon steel was annealed, normalized, and quenched and tempered. Fatigue crack growth rates in 0.1-90 MPa hydrogen gas of these three steels were accelerated, compared with those in air. However, carbides of V and Mo limited the accelerations of crack growth rates. It was found that V and Mo addition is useful to develop hydrogen fatigue resistant carbon steel for hydrogen pipe lines.
