Experimental studies the effect of flap peening process on aluminum alloys

The effects of flap peening on surface characteristics of aluminum alloy (7075-t6) is used in a wide range in airframes and structured; it has high ability for corrosion,since the corrosion resistance for this type of metal is relatively small. flap peening is a process applied to add residual compression stresses in metallic surfaces with the intent of improving the material when exposed to corrosion due to stress and fatigue. some studies about the effect of the flap peening process,on the fatigue resistance,bending fatigue behavior and residual surface stress in the aluminum alloys,have been performed. however,the effect of the flap peening process parameters on the corrosion and oxidation resistance of the aluminum alloys is not well known. in the present study,the influence of flap peening treatment on hardness and corrosion behavior of aluminum alloy (7075-t6) is investigated,compared with sand blasting process. in addition,the effect of the flap peening process parameters on the corrosion and oxidation resistance of the aluminum alloys is investigated. the obtained results show that the aluminum alloy (7075-t6) samples,treated with flap peening,presented a significant modification on the surface morphology,as seen by scanning electron microscopy (sem) photos. according to the hardness measurement results,the shot peening treatment increases the surface hardness and an important decrease of oxidation and corrosion resistance was noted,evidencing that the flap peening process compromises the chemical and physical properties of the surface. © 2017 jordan journal of mechanical and industrial engineering.