Experiments are conducted using AISI 304 stainless steel, with the chemical composition 06Cr19Ni10 and face-centered cubic (FCC) structure. First, seven blanks were acquired via wire cutting with dimensions ϕ25 × 20 mm. Two sets of samples were designed: (1) #A0-A4 were processed to obtain varying surface roughness, and (2) #B1-B2 were heat treated to obtain varying microstructures. The upper and lower surface of samples #A0-A4 were processed by electrical discharge machining to obtain a group of
