A unified damage-healing model for laser shock repair of copper film

Xiao Dong Liu, De Guang Shang, Li Hong Zhang, Tao Chen, Y. B. Guo, M. E. Barkey

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A healing method for fatigue damage was studied by laser shock peening (LSP) with excimer laser for polycrystalline copper film. It is found that the reduction of plastic strain range due to laser shock peening could be responsible in the improvement of residual fatigue lives for the damaged specimens by LSP, and the degree of reduction in plastic strain range for the damaged specimens by LSP is more evident when the stress range is larger. According to the variation of the fatigue ductility of the specimen before and after LSP, a unified damage-healing model is proposed during the damage-healing process for copper specimens. The predicted lives by the proposed method agree well with the experimental results.

Original languageEnglish (US)
Pages (from-to)145-153
Number of pages9
JournalInternational Journal of Fatigue
Volume63
DOIs
StatePublished - Jun 2014

Fingerprint

Shot peening
Copper
Repair
Shock
Damage
Laser
Lasers
Plastics
Plastic deformation
Fatigue of materials
Range of data
Excimer Laser
Fatigue Damage
Ductility
Model
Fatigue Life
Fatigue damage
Excimer lasers
Fatigue
Experimental Results

All Science Journal Classification (ASJC) codes

  • Modeling and Simulation
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Keywords

  • Fatigue damage
  • Fatigue ductility
  • Healing
  • Laser shock peening
  • Plastic strain range

Cite this

Liu, Xiao Dong ; Shang, De Guang ; Zhang, Li Hong ; Chen, Tao ; Guo, Y. B. ; Barkey, M. E. / A unified damage-healing model for laser shock repair of copper film. In: International Journal of Fatigue. 2014 ; Vol. 63. pp. 145-153.
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A unified damage-healing model for laser shock repair of copper film. / Liu, Xiao Dong; Shang, De Guang; Zhang, Li Hong; Chen, Tao; Guo, Y. B.; Barkey, M. E.

In: International Journal of Fatigue, Vol. 63, 06.2014, p. 145-153.

Research output: Contribution to journalArticle

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T1 - A unified damage-healing model for laser shock repair of copper film

AU - Liu, Xiao Dong

AU - Shang, De Guang

AU - Zhang, Li Hong

AU - Chen, Tao

AU - Guo, Y. B.

AU - Barkey, M. E.

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AB - A healing method for fatigue damage was studied by laser shock peening (LSP) with excimer laser for polycrystalline copper film. It is found that the reduction of plastic strain range due to laser shock peening could be responsible in the improvement of residual fatigue lives for the damaged specimens by LSP, and the degree of reduction in plastic strain range for the damaged specimens by LSP is more evident when the stress range is larger. According to the variation of the fatigue ductility of the specimen before and after LSP, a unified damage-healing model is proposed during the damage-healing process for copper specimens. The predicted lives by the proposed method agree well with the experimental results.

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