Influence of severe shot peening on wear behaviour of an aluminium alloy

Abstract

Recent developments in shot peening demonstrate that it can be applied using unconventional parameters in order to obtain nanocrystals on a thin surface layer of the treated material. These microstructural modifications have shown to be able to induce superior fatigue and corrosion properties, but still few data are available about their effect on wear behaviour of the materials.In this study, four series of Al 6063 alloy specimens, as‐received, conventionally shot peened, severely shot peened and severely shot peened followed by a slight mechanical grinding are subjected to block on ring wear tests with lubrication, according to ASTM G77 standard. The results evidence the significant role played by the applied shot peening treatments on wear behaviour of the 6063 aluminium alloy with respect to the as‐received not peened material. The important effect of the surface roughness is also highlighted. The data are discussed on the basis of roughness, surface layer microstructure, microhardness trends and the wear marks observed by means of scanning electron microscopy.

Surface, Subsurface and Tribological Properties of Ti6Al4V Alloy Shot Peened under Different Parameters

“…As shot peening inevitably modifies surface and subsurface properties as a function of peening parameters, it is important to elucidate the tribological behavior of shot-peened materials, which have not yet been fully understood in the literature [ 19 , 26 ]. Differing conclusions have been presented in the existing literature as some studies highlighted that shot peening improves the tribological behavior of materials [ 35 , 72 , 73 ], whereas others reported that shot peening detrimentally affects wear resistance [ 71 ]. The effect of shot peening on the friction and wear behavior of materials is still largely unexplored [ 26 ], and there has been an increasing interest on revealing the tribological behavior of shot peened materials [ 7 , 34 , 71 , 72 , 74 , 75 , 76 ].…”

Effects of nanofeatures induced by severe shot peening (SSP) on mechanical, corrosion and cytocompatibility properties of magnesium alloy AZ31

“…In SSP, the process parameters are set in a way to considerably increase the kinetic energy that is transmitted to the treated material in order to induce grain refinement. SSP has been applied to a wide class of materials including low alloy steels, stainless steels, cast iron and Al alloys [42][43][44][45][46][47][48]. This choice was motivated by reports on the favorable effects of conventional shot peening in improving limited fatigue properties of Mg alloys typically used in the automotive and aerospace industries [16,29,49,50].…”

Effect of shot peening on metastable austenitic stainless steels

“…Among a great variety of surface treatments, shot peening is one of the most widely used techniques to increase the resistance of metal parts to fatigue in a large range of industries, such as automotive, aerospace and petrochemical [7,8,9]. It consists of blasting high velocity small beads on the metal component to generate surface hardening and compressive residual stresses which oppose to the nucleation of cracks and also exert a closure effect on those cracks already nucleated, avoiding their propagation [10,11].…”