*Article* **Influence of the Stainless-Steel Microstructure on Tribological Behavior and Surface Integrity after Ball Burnishing**

**Alejandra Torres 1,2, Nuria Cuadrado 1,3, Jordi Llumà 3, Montserrat Vilaseca <sup>1</sup> and J. Antonio Travieso-Rodriguez 2,\***


**Abstract:** Burnishing is a plastic deformation process that reduces roughness while increasing hardness by introducing compressive residual stresses near the surface zone. These improvements will depend mainly on two fundamental variables: the applied load and the friction derived from the tool–surface interaction. Nevertheless, microstructural differences in the materials have not yet been considered within this interaction. This leads to a generalization of the process that can result in the failure of industrial components. Therefore, the aim of this work is to study the microstructural influence of the ball-burnishing process from a tribological perspective. Thus, martensitic and austenitic stainless steels were evaluated in terms of friction and surface integrity. The results show that parameterizing the process according to the tool–surface interaction is critical since improvements depend on friction as a function of the availability of plastic deformation of the crystallographic structures.

**Keywords:** ball burnishing; tribological interaction; stainless steel; friction coefficient; surface integrity
