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

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• 作者：Jie Sheng (1)
  Jianzhong Zhou (1)
  Shu Huang (1)
  Yufen Mei (1)
  Dan Mu (1)
  Xiankai Meng (1)
  Jinrong Fan (1)
  
  1. School of Mechanical Engineering ; Jiangsu University ; Xuefu Road 301 ; Jinkou District ; Zhenjiang ; 212013 ; People鈥檚 Republic of China
  
• 关键词：Laser peening (LP) ; Micro ; dent arrays ; Tribological properties ; Surface morphology ; Anti ; wear ; Lubrication
• 刊名：The International Journal of Advanced Manufacturing Technology
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：76
• 期：5-8
• 页码：1285-1295
• 全文大小：3,181 KB
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• 刊物类别：Engineering
• 刊物主题：Industrial and Production Engineering
  Production and Logistics
  Mechanical Engineering
  Computer-Aided Engineering and Design
  
• 出版者：Springer London
• ISSN：1433-3015

文摘

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.