Estimation of Corrosion Fatigue-Safe Life of 7B06-T6 and 30CrMnSiA JointSpecimens

Abstract

The 7B04-T6 and 30CrMnSiA joints were pretensioned and exposed to hot and humid marine climate for corrosion test. They were taken back after different cycles of test and fatigue-loaded. Then the fatigue life values of six cycles were studied. The fatigue-safe life of the joints was estimated by using the one-sided tolerance factor method. The results show that the fatigue life of the joint specimen is greatly reduced by the interaction of the corrosive environment and fatigue load. Taking the confidence and reliability into consideration, the one-sided tolerance factor method makes it is possible to obtain an accurate estimated value of fatigue-safe life and thus plays a guiding role in the use of engineering application materials.