材料
Online ISSN : 1880-7488
Print ISSN : 0514-5163
ISSN-L : 0514-5163
中高温不活性ガス環境下における疲労き裂進展特性とき裂開閉口
小倉 敬二西川 出三好 良夫
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1989 年 38 巻 435 号 p. 1395-1401

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Fatigue crack growth and crack closure at moderately elevated temperatures were investigated in low carbon steel (SM41A), Cr-Mo-V steel and type 304 stainless steel (SUS304). A critical experiment was made to examine the cause of increase in fatigue threshold at elevated temperatures in air environment. Samples of low carbon steel and type 304 stainless steel were tested in argon gas at 300°C. The fatigue threshold and crack closure were compared with those in air at the same temperature. It was concluded that the oxidation at elevated temperatures would contribute to the increase in fatigue threshold through the double effects of the enhanced crack closure and the increased fatigue crack growth resistance.

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