Recovery of Fatigue Damage and Life Prediction by Laser Irradiation Healing Treatment for Copper Film

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• 作者：Yu-Bo Guo (1)
  De-Guang Shang (1)
  Xiao-Dong Liu (1)
  Chong-Gang Ren (1)
  Feng-Zhu Liu (1)
  Li-Hong Zhang (1)
  Yu-Juan Sun (1)
  
  1. College of Mechanical Engineering and Applied Electronics Technology ; Beijing University of Technology ; Beijing ; 100124 ; P. R. China
  
• 关键词：Copper film ; Fatigue damage ; Healing damage ; Laser irradiation ; Life prediction ; Local stress transformation
• 刊名：Journal of Materials Engineering and Performance
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：24
• 期：1
• 页码：106-113
• 全文大小：1,402 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Characterization and Evaluation Materials
  Materials Science
  Tribology, Corrosion and Coatings
  Quality Control, Reliability, Safety and Risk
  Engineering Design
  
• 出版者：Springer New York
• ISSN：1544-1024

文摘

A fatigue life prediction method was investigated after healing fatigue damage by excimer laser irradiation treatment for the damaged copper film. First, the variations of residual fatigue life and strain range for the damaged specimens after laser irradiation healing treatment were analyzed. The results showed that the fatigue damage can be effectively healed by laser irradiation for copper film. The presented healing phenomenon during laser irradiation process showed that the recovery of fatigue damage can result in the improvement in fatigue life for the damaged copper film. Then, based on the fact that the strain concentration factor of copper film had not been changed before and after laser irradiation treatment, a residual fatigue life prediction method was proposed by the local stress transformation. The predicted residual fatigue lives by the proposed method agreed well with the experimental results for copper film after laser irradiation treatment.