溶接学会論文集
Print ISSN : 0288-4771
中温大気中環境における溶接継手の疲労き裂伝ぱ特性
鈴木 直之太田 昭彦前田 芳夫
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1997 年 15 巻 2 号 p. 365-369

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Fatigue crack propagation rates of SB450 steel plate were measured at a stress ratio of 0. The fatigue crack propagated through the weld metal or the base metal at room temperature and 300°C in air. In order to perform the high temperature test, a special furnace was made. The furnace achieved the proper distrbution of temperature, which reduced the compressive thermal sterss near the center portion of specimen below 1 MPa. The low thermal stress condition avoided the enhancement of fatigue crack closure. Finally, the same fatigue crack propagation properties were obtained at room temperature and 300°C.

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