Abstract
The effects of overloading condition on the fatigue threshold stress intensity factor range (AKth) in type 316 austenitic stainless steel (SUS316) were studied. Overloading was applied to a compact tension specimen of SUS316, then fatigue tests were carried out to determine the resultant zIKth. In the previous study, it was found that the apparent value of the AKth increased with increasing stress intensity factor by single tensile overloading. In this study, it was found that if a compressive overloading was applied after tensile overloading, the apparent z1Kth showed no increase. However, if a tensile overloading was further applied after compressive overloading, the apparent z11(th increased as high as the results obtained by a single tensile overloading.
