溶接学会論文集
Print ISSN : 0288-4771
SM50A鋼およびSUS304鋼溶接継手の下限界近傍における疲労き裂伝ぱ特性
武藤 睦治坂本 勲田中 一夫
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1986 年 4 巻 4 号 p. 709-715

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The fatigue crack growth behavior near threshold region in a Type 304 stainless steel and its welded joints (GMAW and EBW) was investigated. The behavior in an SM50A steel and its welded joint (GMAW) was also investigated to compare the difference of threshold behavior between austenitic steel and normal pearlite-ferrite steel. Although the effects of residual stress on the fatigue crack growth rate and threshold value were quite significant, that of microstructure of the weld metal was also found to be significant in both welded joints: The growth rates of weld metal specimens were higher than that of parent metal specimens near threshold region when the crack growth rate was plotted against effective stress intensity range.

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