Development of periodical micro-structured surface using angled fine particle peening

Abstract

Periodical ridge microtextures are formed on material surfaces by fine particle peening (FPP) with a shallow peening angle. However, the influences of various FPP conditions on the formation of ridge microstructures have not been clarified. This study was performed to investigate the relationship between FPP conditions and the shape and size of the ridge texture, and then to explore methods for fabricating periodical microstructured surfaces. The results indicated that increasing peening time and particle supply rate under certain conditions can increase the ridge size. The ridge size was also shown to be dependent on the hardness of the substrate and the particle diameter. On the other hand, the possibility of forming uniform ridges over a large area should be possible by overlapping the processing area of FPP.