1980 年 29 巻 326 号 p. 1101-1107
Hydrogen content in SCM 3 and 5 steels was measured as a function of electrode potential, temperature, sustained strain and strength of steel by using a modified electrochemical permeation technique with which nickel in replace of palladium was electrodeposited on the surface of specimen. The deformation of specimen was found to cause a significant increase in hydrogen content.
The time to failure of the notched specimen, of SCM 5 steel was measure by changing stress and hydrogen content. The hydrogen content at the cracked part of specimen was estimated from a solution of diffusion equation and was found to be fair agreement with other studies. However, the specimen having a higher content of hydrogen prior to loading and a notch filled with resin showed a longer life. The reason of such abnormal phenomenon is not clear yet.