Relationship between stress and dislocation structure of fatigued polycrystalline copper

The relationship between the saturated stress and the dislocation structures in fatigued polycrystalline copper is quantitatively evaluated from region A to region C. It is revealed that the saturated stress is linearly related to the inverse spacing between the dislocation walls. The value of the coefficient K in the meshlength theory is determined to be equal to 7.89 and is in agreement with the value of 8 obtained from theoretical …