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Characterization and tribological properties of micro-dent arrays produced by laser peening on ZCuSn10P1 alloy

International Journal of Advanced Manufacturing Technology, ISSN: 1433-3015, Vol: 76, Issue: 5-8, Page: 1285-1295
2015
  • 17
    Citations
  • 0
    Usage
  • 14
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    17
    • Citation Indexes
      17
  • Captures
    14

Article Description

The aim of this paper is to introduce laser peening (LP) process for fabricating micro-dents on the surface of ZCuSn10P1 alloy, thereby improving the surface tribological properties of LPed (treated by LP) samples. Surface morphology, residual stress, nano-hardness, and elastic modulus of LPed samples were characterized. Friction and wear behaviors of untreated and LPed samples were investigated by using a UMT-2 test machine. It has been shown that LP is capable of efficiently producing micro-dent arrays with a controllable size. Higher nano-hardness and elastic modulus were identified in the center areas of micro-dents compared with dent brim areas. Compressive residual stress can also be found in the near-surface regions of LPed samples and the value increasing with the amplification of laser pulse energy. Tribological properties of samples under two kinds of friction conditions were investigated. For dry friction condition, both the friction coefficients and wear mass loss of LPed samples are higher than the untreated samples, illustrating that the LP process cannot improve wear resistance under dry friction condition. Compared with untreated samples, the friction coefficients of the LPed samples decrease under oil lubrication condition. Meanwhile, both dent density and dent aspect ratio affect the anti-wear performance. The above studies may provide important reference for surface modification of metal materials.

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