Abstract
In order to clarify the effect of the hydrogen environment on the slip behavior of a low carbon steel JIS S10C, fully reversed bending tests were carried out in hydrogen environment and in nitrogen environment. The main obtained result is as follows. The slip band continued developing over the 10^7 cycles in hydrogen environment. More crystal grains had slipped in hydrogen environment than in nitrogen environment after the fatigue test. This shows that the hydrogen environment prevented slip development from stopping. In order to compare the slip of each crystal grains microscopically in hydrogen environment with nitrogen environment, each crystal orientation is identified through EBSD analysis. The active slip system and Schmid factor of that identified through EBSD analysis and SEM image is also used to observe the slip.
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