オーステナイト系ステンレス鋼の腐食疲労に関する研究(第5報) : 表面圧延と焼ばめの影響

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概要

• 論文の詳細を見る

• Surface rolling of the specimen was achieved by pressing screw and three hard rollers having 20 mm diameter and 12 mm contour radius, screw pressure of 100 kg or 150 kg being applied. Fatigue strength was remarkably increased both in the corrosive environments than in air, and in case of stainless steel, much more improvement of endurance was attained for austenitic steel than for ferritic steel both in 5% H_2SO_4 saturated with air at 25℃ and in air. In slightly corrosive environment, even mild steel showed as good improvement as that of austenitic stainless steel, however in highly corrosive environment dangerous downward S-N curves wee exhibited. It was postulated that improved endurance could predominantly be attributed to its suppressing effect against forming of hemispherical corrosion pit, though residual compressive stress was favorable to prevent spreading fatigue fissures, and this interpretation was supported by micrographic examinations and potential measurements. As a conclusion, general effects of surface rolling on corrosion fatigue, presumably, involve three ways ; firstly in a corrosive environment in which a metal is fully protected by corrosion product or by passive film, more stress concentration would have been resulted which initiated fissures due to more predominant effect of rapid contraction of anodic area than effect of ready decrease of general corrosion, as was pointed out by Gould and Evans, and aggravated endurance would be resulted ; secondly if a metal could be freely soluble, stress concentration also could be avoided and prolonged corrosion fatigue life would be temporarily, resulted; thirdly, if a corrosive medium offered marginal property to a metal, effective control against initiation of corrosion pit would be resulted, without causing dangerous stress concentration and the highest protection against corrosion fatigue could be attained. Inferring from serious damage observed in shrink fitted austenitic stainless steel into hard steel, the same deterioration of corrosion fatigue would be expected in other cases of such cladding or overlaying.

• 社団法人日本材料学会の論文
• 1963-01-15

著者

• 木島 茂

  住友化学工業(株)新居浜製造所

• 木島 茂

  住友化学工業株式会社

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• 水の性質と腐食
• オーステナイト系ステンレス鋼の腐食疲労に関する研究(第5報) : 表面圧延と焼ばめの影響
• オーステナイト系ステンレス鋼の腐食疲労に関する研究(第4報) : カソード電流の印加および酸化性カチオン添加の影響
• オーステナイト系ステンレス鋼の腐食疲労に関する研究(第3報) : 予備繰返応力と予備腐食の影響
• オーステナイト系ステンレス鋼の腐食疲労に関する研究(第2報) : 液温および繰返速度の影響
• オーステナイト系ステンレス鋼の腐食疲労に関する研究(第1報) : 希酸溶液中における316型ステンレス鋼の腐食疲労挙動

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