nfluence of frequency on fretting fatigue damage behavior of Al-Zn-Mg alloy was studied in this paper. Fretting fatigue lives and damage characteristics of Al-Zn-Mg alloy were researched under different frequencies. Macroscopic tests and microscopic analysis were used to study on influence of frequency on fretting fatigue damage behavior of Al-Zn-Mg alloy. Fatigue lives would be greatly reduced by fretting under the experimental conditions in this paper. With frequency increasing, fretting fatigue lives were firstly decreased and then increased (f=9Hz). Fretting scar, which was the important reason for fretting fatigue crack initiation, was caused by embedding debris; eventually, crack initiated at the edge of the fretting scar. Fretting fatigue fracture is a whole process of crack initiation, propagation and final fracture. And final fracture increased with frequency reducing, which was generally occurred near the center of the fracture.
Effect of frequency on multi-axial fretting fatigue damage behavior of Al-Zn-Mg alloys
