Abstract
The hydrogen diffuses and accumulates at the stress concentration area like a crack tip and it causes hydrogen embrittlement. To clarify the mechanism of hydrogen embrifflement, it is important to obtain the hydrogen concentration behavior. However, experimental detection of hydrogen distribution is not feasible due to the high diffusivity of hydrogen in materials and the numerical analyses have been proceeded. In this paper, by using Finite Element Method (FEM) and Finite Difference Method (FDM) coupled method which is the diffusion analysis by FDM coupled the stress analysis by FEM, the analyses of hydrogen diffusion were conducted under cyclic loading conditions. The hydrogen diffusion behavior and its influence for hydrogen embrittlement were obtained.
