Abstract: Compared to 316L stainless steel manufactured using conventional methods, 316L stainless steel produced through selective laser melting (SLM) possesses superior mechanical properties and broader application potential. However, due to the inherent characteristics of the additive manufacturing process, the surface integrity of the material is relatively poor, which subsequently affects its fatigue life and corrosion resistance. Ultrasonic surface rolling, a mechanical surface treatment technology, can significantly improve surface integrity. Yet, current research has not systematically quantified how various parameters collectively influence surface integrity. In this work, a combination of factorial and Taguchi methods was used to quantify the impact of individual parameters and delve into the interactions between parameters, optimizing process parameters to achieve comprehensive improvement in surface integrity. Additionally, advanced characterization techniques were employed to explore the strengthening mechanism of ultrasonic surface rolling and the microstructural evolution of SLM 316L.
 

Selective laser melting,316L,Ultrasonic surface rolling process,Parameter optimization