QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY
Print ISSN : 0288-4771
On Near-Threshold Fatigue Crack Growth in SM50A Steel and SUS304 Steel Weldments
Yoshiharu MutohIsao SakamotoKazuo Tanaka
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1986 Volume 4 Issue 4 Pages 709-715

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Abstract

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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