The Study on Fatigue Behavior in Very High Cycle of 5083 Aluminum Alloy
Fatigue tests were carried out at frequent of 20 kHz for 5083 aluminum alloy. The loading way is uniaxial and bending loading. The S-N curve of uniaxial loading presents a duplex curve corresponding to surface fracture and interior fracture. However the S-N curve of the bending fatigue shows the continuous curve. This demonstrates that different loading ways lead to different S-N curve characteristics. For uniaxial loading, almost all crack initiated interior of specimen in the very high cycle regime. The crack source zone appears wear away because of the constant pressure and grinding of this area in the process of cyclic loading. For the symmetric bending loading, the crack of corner in the specimen expands at different rates and direction.
Yeong-Maw Hwang and Cho-Pei Jiang
G. L. Yan et al., "The Study on Fatigue Behavior in Very High Cycle of 5083 Aluminum Alloy", Key Engineering Materials, Vol. 626, pp. 359-364, 2015