The Effect of Shot-Peening Against Stress-Corrosion Cracking of Austenitic Stainless Steels (Study on Stress-Corrosion Cracking of Austenitic Stainless Steels, 1st Report)

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  • オーステナイト・ステンレス鋼の応力腐食亀裂に対するショット・ピーニングの効果について
  • オーステナイト ステンレス コウ ノ オウリョク フショク キレツ ニ タイスル ショット ピーニング ノ コウカ ニ ツイテ

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Abstract

Assuming that shot-peening leaves compressional stress on metallic surface and may cancel out the harmful tensile stress, the effect of this operation against stress-corrosion cracking of stainless steels was investigated experimentally. A weak peening was practically ineffective, but beyond a degree of peening, stress-corrosion cracking was reduced. A fair success was achieved at the level of peening where “coverage” was 90∼100%, and “archeight” was 0.013∼0.015 A. It is supposed that the uneveness of shot-peened surface may be harmful from the standpoint of general corrosion, but the corrosion resistance of shot-peaned stainless steels did not deteriorate except in corrosive environments which were capable to activate stainless steels.

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