Journal
OPTICS AND LASER TECHNOLOGY
Volume 103, Issue -, Pages 142-150Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2017.12.044
Keywords
Laser surface texturing; laser shock peening; Friction; Wear
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Funding
- National Natural Science Foundation of China [51675237]
- China Postdoctoral Science Foundation [2017M610302]
- Postdoctoral Science Foundation of Jiangsu Province [1701069B]
- Talent Foundation of Jiangsu University in China [15JDG077]
- Changzhou High-technology Research Key Laboratory [CM20153001]
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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. (C) 2018 Elsevier Ltd. All rights reserved.
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