The effects of multiple re-shot peening on fretting fatigue behavior of Al7075-T6

Numerical modelling of fretting fatigue

“…Deep pitting in the contact e of two specimens under fretting [3]. The figure clearly indicates that the fracture surface consists of three quite distinct regions; a fretting fatigue zone created ropagation, a crack growth zone and a tensile region which gives rise to fracture of It is generally thought that and propagation is more related to A micrograph of fretting crack propagation in a stainless steel alloy is 5.…”

“…4 shows a fracture surface of a specimen after failure by fretting fatigue [3] indicates that the fracture surface consists of three quite distinct regions; a fretting fatigue zone created ropagation, a crack growth zone and a tensile region which gives rise to fracture of specimen when it is sufficiently weakened by the crack zone development. It is generally thought that crack initiation is governed primarily by the local contact stresses and propagation is more related to A micrograph of fretting crack propagation in a stainless steel alloy is 5.…”

“…This stage corresponds to a state of partial slip in which a combination of the effects of modes I K and II K takes place. In the third age, crack grows perpendicular to the normal load direction, by shear due to tensile stress, only by Fracture surface of a specimen failure by fretting fatigue [3]. Figure 5.…”

Fretting fatigue tests on shrink-fit specimens and investigations into the strength enhancement induced by deep rolling

“…Similarly, deep rolling introduces a compressive treatment on the surface, and in the literature fatigue improvement particularly concerns the low plasticity burnishing with the ball type indenter; for example the paper by Prevéy and Cammett on 7075-T6 alloy [51]. Fretting fatigue improvement with shot peened and deep rolling was reported by Majzoobi et al [52][53][54] where a dedicated equipment was used for the rolling of the specimens. Santus et al [55] recently investigated a conical indenter that can be used both on milling and turning machines, and the parametric dependences of the residual stress distributions were experimentally obtained.…”

A Study on Surface Modification of Al7075-T6 Alloy against Fretting Fatigue Phenomenon

“…The shot peening technique improves fretting fatigue life by a significant 300%. Majzoobi and Ahmadkhani in a similar endeavor investigated the influence of regular reshot peening on the resistance of Al7075-T6 against fretting fatigue [60]. They found that it is possible to considerably enhance the material's behavior against fretting fatigue with reshot peening.…”