The Interaction between Hydrogen and Surface Stress in Stainless Steel

This paper reveals the interaction between hydrogen
and surface stress in austenitic stainless steel by X-ray diffraction
stress measurement and thermal desorption analysis before and after
being charged with hydrogen. The surface residual stress was varied
by surface finishing using several disc polishing agents. The obtained
results show that the residual stress near surface had a significant
effect on hydrogen absorption behavior, that is, tensile residual stress
promoted the hydrogen absorption and compressive one did opposite.
Also, hydrogen induced equi-biaxial stress and this stress has a linear
correlation with hydrogen content.

• O. Takakuwa
• Y. Mano
• H. Soyama

• Hydrogen embrittlement
• Residual stress
• Surface finishing
• Stainless steel.

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