Indentations near Crack Tip in Al-5086 and Characteristics of Fatigue crack Propagation

Al-5086의 균열선단에 가공한 압흔과 피로균열전파특성

It is useful way to make indentations near crack tip in order to increase fatigue life or repair a fatigue crack. In this study, bending fatigue tests were performed to investigate the optimal position of the indentations near crack tip. The results shows that fatigue life of the specimen is dramatically increased by indentation and the most effective location is the back of the crack tip.