Effects of Heat Treatment and Diamond Burnishing on Fatigue Behaviour and Corrosion Resistance of AISI 304 Austenitic Stainless Steel

The surface cold working (SCW) of austenitic stainless steel (SS) causes martensitic transformation in the layers, and percentage fraction strain-induced martensite depends on degree SCW. Higher content α′−martensite increases micro-hardness fatigue strength, but deterioration corrosion resistance is possible. Therefore, desired operational behaviour SS can be ensured by corresponding SCW heat treatment. This article evaluates effects performed diamond burnishing (DB) treatment integrity (SI), rotating AISI 304 for two initial states: as-received hot-rolled bar initially heat-treated at 1100 °C one hour followed quenching water. Then, DB was implemented as a smoothing hardening process, both alone combination with 350 three hours after DB. electrochemical performance examined open circuit potential measurements, potentiodynamic tests. For states, provided lowest roughness, whereas an improvement maximum obtained subsequent strength multi-pass without state. Smoothing maximised minimum rate state, simultaneously lead to high limit (equal that single-pass DB) low rate.