人工海水中における耐海水２相ステンレス鋼の腐食疲労き裂進展挙動

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タイトル別名
  • Corrosion fatigue crack growth behavior of dual-phase stainless steel in synthetic sea water.
  • ジンコウ カイスイチュウ ニ オケル タイ カイスイ 2ソウ ステンレス コウ

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抄録

The corrosion fatigue crack growth rate of dual-phase stainless steel SUS329J1 has been measured in synthetic sea water at various stress ratios and stress cycle frequencies under free corrosion and a cathodic potential. In air the roughness-induced wedge effect enlarges the region II in the load-strain hysteresis loop. In synthetic sea water, the corrosion products-induced wedge effect under free corrosion and the Ca and Mg deposites-induced wedge effect under a cathodic potential are conspicuous, thereby enlarging the region II and raising Kop. Under free corrosion the stress assisted dissolution accerelates the crack growth rate at a low ΔKeff. In addition, at a high ΔKeff at R=0.1 and f=0.17Hz the crack growth rate is much more accerelated due to hydrogen embrittlement. Under a cathodic potential, ΔKth is remarkably high. But the crack growth rate is much accerelated due to hydrogen embrittlement in terms of ΔKeff.

収録刊行物

  • 材料

    材料 36 (409), 1104-1109, 1987

    公益社団法人 日本材料学会

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