Prevention of SCC Properties by Overloading Effect in Stainless Steel

Abstract

The effects of overload on the threshold stress intensity factor (K ISCC ) 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 K ISCC . The values of K ISCC were found to increase with increasing stress intensity caused by tensile overload. Comparison of the effects of tensile overload on K ISCC of SUS304 and SUS316 revealed that the effects of overload on K ISCC of SUS304 was smaller than that of SUS316. Both K th and K ISCC can be predicted by the similar equation considering the effects of overload.