A.H Mahmoudi - Associate Professor, Department of Mechanical Engineering, University of Bu-Ali Sina, Hamedan, Iran
F Salahi - MSc student, Department of Mechanical Engineering, University of Bu-Ali Sina, Hamedan, Iran
b Maleki - Directing Manager, Radox Group, Tehran, Iran

One of the ways to enhance the fatigue life of the engineering components is to induce compressive residualstresses using peening processes. Among all the peening techniques, waterjet peening (WJP) is one of the youngest.WJP is similar to shot peening, with the difference that water droplets are used instead of pellets. WJP in comparisonwith shot peening has the advantage of creating a better surface. However, it produces a smaller region of compressiveresidual stresses. In the current study, WJP was examined on an aerospace class of aluminum alloy. Differentparameters of WJP were examined both experimentally and numerically. For instance, the applications of WJP whenthe jet of water is constant or when it was moved were studied. Furthermore, the induced residual stresses weremeasured and compared with the numerical predictions

Water jet peening, Residual stresses, Fatigue