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Effect of Fe particle on the surface peeling in Cu−Fe−P lead frame

  • Su Juanhua
  • Liu Ping
  • Dong Qiming
  • Li Hejun
  • Tian Baohong
Article

Abstract

Under the surface peeling of Cu−Fe−P lead frame alloy larger Fe particles were observed by energy dispersive spectroscopy. By using the large strain two-dimension plane strain model and elastic-plastic finite element method, the cause for peeling damage of Cu−Fe−P lead frame alloy was investigated. The results show that when the content of Fe particles is more than 30% at local Fe-rich area the intense stress concentration in the Fe particle would make the Fe particle broken up. The high equivalent stress mutation and the mismatch of equivalent strain 10% at the two sides of interface make it easy to develop to crack and peeling damage on finish rolling. The larger Fe particles in the Cu−Fe−P alloy should be avoided.

Key words

Cu−Fe−P lead frame surface peeling equivalent Stress equivalent strain 

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Copyright information

© Wuhan University of Technology 2006

Authors and Affiliations

  • Su Juanhua
    • 1
    • 2
  • Liu Ping
    • 1
  • Dong Qiming
    • 1
  • Li Hejun
    • 2
  • Tian Baohong
    • 1
  1. 1.College of Materials Science and EngineeringHenan University of Science and TechnologyLuoyangChina
  2. 2.College of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'anChina

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