AA7075 alloy is exposed to severe shot peening (SSP) with an Almen intensity of 20A. The microstructure is analyzed via FEGSEM and EBSD microscopy. X-ray diffraction (XRD) analysis is used to evaluate the crystallite size in terms of FWHM measurements. The residual stress measurements show a thicker compressed layer (600 µm) formed by SSP. Microhardness improvements are observed as 30% on topmost surface and releases substantially after 600 µm. Coefficient of friction (COF) of treated material remains higher throughout the sliding distance, however, is reduced particularly in the early stage of sliding distance for the wear load of 20 N. The effect of SSP is vanished particularly at lower loads with longer sliding distances. Besides, improvement on fatigue behavior is observed after SSP despite the increase of roughness remarkably.

AA7075合金暴露于Almen强度为20A的严格喷丸处理（SSP）中。通过FEGSEM和EBSD显微镜分析微观结构。X射线衍射（XRD）分析用于根据FWHM测量评估微晶尺寸。残余应力测量表明，由SSP形成的压缩层较厚（600 µm）。观察到在最表面上的显微硬度提高了30％，并且在600 µm后基本释放出来。在整个滑动距离内，已处理材料的摩擦系数（COF）保持较高，但是，在20 N的磨损载荷下，尤其是在滑动距离的早期阶段，摩擦系数（COF）降低。特别是在滑动距离较长的较低载荷下，SSP的作用消失了。此外，尽管粗糙度显着增加，但是在SSP之后仍观察到疲劳行为的改善。