高張力鋼HT50の酸素消費ならびに水素発生腐食条件下における疲労微小表面き裂の進展挙動

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rights: 本文データは社団法人日本機械学会の許諾に基づきCiNiiから複製したものであるSmall corrosion fatigue crack growth behavior was investigated using smooth high-tensile strength steel HT 50 plate specimens in a sodium chloride aqueous solution (oxygen diffusion-type corrosion) and an acid solution made by adding H_2SO_4 to the salt water (hydrogen evolution-type corrosion). At a constant effective stress intensity factor range, the crack growth rate of the surface cracks increases with increasing stress amplitude range. That is, the crack growth rate of a small-size surface crack is higher than that of a comparatively large-size surface crack. This experimental result is observed in both types of corrosion conditions : oxygen diffusion-type corrosion and hydrogen evolution-type corrosion, and this peculiar crack growth behavior becomes marked in the latter corrosive environment whose corrosive capability is stronger than that of the former.
一般社団法人日本機械学会の論文
1990-02-25