A novel controlled impact process for the formation of nanostructured surface in AISI304 stainless steel

► Controlled ball impact process for nano surface formation on metallic materials ► Ball makes the controlled impacts on the sample surface moved precisely. ► Process parameters are selected using an analytical model. ► XRD and TEM results confirm nano surface in AISI304 stainless steel. ► Sample travelling velocity controls the nano grain size formation.