中・高温大気中におけるSFVV3 鋼の疲労き裂進展特性とき裂開閉口

概要

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Fatigue crack growth characteristics and crack closure for an A 508-3 steel were investigated at elevated temperatures (150℃ and 288℃). The results obtained are summarized as follows: (1) The occurrence of oxidation of crack surfaces at elevated temperatures can affect the formation of fretting oxide debris in fatigue crack growth and has an important role on the near-threshold characteristics. (2) It can be possible to exclude the contribution due to fretting oxide debris and oxidation at elevated temperature on the near-threshold characteristics by the selection of a moderate test temperature. In this case, the characteristic is controlled only by plasticity induced crack closure and becomes a structure- and enviroment-insensitive material constant.
社団法人日本機械学会の論文
1984-05-25