Friction and wear on laser textured Ti6Al4V surface subjected to laser shock peening with contacting foil. (July 2018)

• Record Type: Journal Article
• Authors: Dai, F.Z.; Geng, J.; Tan, W.S.; Ren, X.D.; Lu, J.Z.; Huang, Shu
• Is Part Of: Optics & laser technology. Volume 103(2018)
• Page Start: 142
• Page End: 150
• Publication Date: 2018-07
• Subjects: Laser surface texturing -- Laser shock peening -- Friction -- Wear; Optics -- Periodicals; Lasers -- Periodicals; Electronic journals; 621.366
• DOI: 10.1016/j.optlastec.2017.12.044
• Languages: English
• ISSNs: 0030-3992

Abstract

Highlights: Micro-dimple surface was subjected to laser shock peening with contacting foil. Enclosure of micro cracks on bottom of micro dimple is found. MLST+HCLSP treated sample reveals improved friction and wear performance. Abstract: The Ti6Al4V micro-dimple surfaces fabricated by a masked laser surface texturing (MLST) technique within water were subjected to soft contact laser shock peening (SCLSP) and hard contact laser shock peening (HCLSP). The effects of these two LSP methods on topography, micro-hardness and residual stress distribution were studied. The friction and wear performance under dry friction and oil lubrication were also studied. The enclosure of micro cracks in the micro-dimple bottom was observed when treated by SCLSP and HCLSP. The dry friction and wear test showed that the MLST+HCLSP surfaces had the best wear resistance performance. In the oil lubricated friction test, the occurrence of the hydrodynamic lubrication effect occurred on the micro-dimple surfaces. The MLST+HCLSP exhibited the best friction and wear resistance performance. These were due to the micro-hardness increase, the producing of compressive residual stress and the surface roughness reduction of as treated surfaces.