Abstract
The effects of overload on the threshold stress intensity factor (KISCC) for stress corrosion cracks (SCC) in type 304 austenitic stainless steel (SUS304) were studied. Tensile overload was applied to a wedge opening loaded specimen of SUS304, and SCC tests were carried out to determine the resultant KISCC. The values of KISCC were found to increase with increasing stress intensity caused by tensile overload. Comparison of the effects of tensile overload on KISCC of SUS304 and SUS316 revealed that the effects of overload on KISCC of SUS304 was smaller than that of SUS316. Both ΔKth and KISCC can be predicted by the similar equation considering the effects of overload.
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