Effect of Ball Burnishing Treatment on the Fatigue Behavior of 316L Stainless Steel Operating Under Anodic and Cathodic Polarization Potentials

Abstract

Corrosion fatigue (CF) behavior of AISI 316L was investigated in a 3 pct NaCl aqueous solution at an R = − 1 stress ratio and a frequency of 60 Hz at room temperature. The test scale specimen was 7 cm2. The passive (0 mVRef), pitting (120 mVRef), and cathodic (− 1400 mVRef) polarization potentials were statically applied and recorded during CF tests until the samples were broken. The shaft material surface was treated with a ball burnishing (BB) process. By the results, the fatigue behavior of AISI 316L was affected by polarization potential and surface treatment. Under 0 mV potential charged tests for 5 × 105 cycles, BB treatment raised the CF strength of the shaft material from about 448 to 702 MPa with a percent 57 increase. Fractographic observations revealed that corrosion pits occurred during the experiments where anodic potential was applied and that transgranular surface fractures occurred in all cases.