Analysis of fatigue damage repair based on laser shock processing for copper film

Author

Li, Ming ; Shang, De-Guang ; Liu, Xiao-Dong ; Jin, Jia ; Chen, Tao ; Guo, Y.B. ; Barkey, M.E.

Author_Institution

Coll. of Mech. Eng. & Appl. Electron. Technol., Beijing Univ. of Technol., Beijing, China

fYear

2012

fDate

5-8 Aug. 2012

Firstpage

1277

Lastpage

1281

Abstract

The effect of laser shock processing on fatigue life was investigated for pre-damaged polycrystalline copper film in this study. First, a series of laser shock processing experiments is performed by changing laser power density and number of pulses for the specimens with the same damage degree. The optimal repairing parameters of laser shock processing is identified by comparing with the fatigue lives of specimens before and after laser shock processing. Next, the effect of laser shock processing on the fatigue lives of the damaged and undamaged specimens under identical laser shock processing parameters is investigated. Finally, the opportunity of repair damage for the specimens with different damage degrees is discussed using the optimal processing parameters for the laser shock processing. The results indicated that laser shock processing has a great potential as a means of repairing the fatigue damage for film components.

Keywords

copper; fatigue; laser materials processing; metallic thin films; shock waves; Cu; fatigue damage repair; film components; laser power density; laser pulses; laser shock processing; optimal processing parameters; polycrystalline copper film; shock waves; Copper; Electric shock; Fatigue; Films; Maintenance engineering; Power lasers; Copper film; Fatigue damage repair; Laser shock processing; Surface morphology;

fLanguage

English

Publisher

ieee

Conference_Titel

Mechatronics and Automation (ICMA), 2012 International Conference on

Conference_Location

Chengdu

Print_ISBN

978-1-4673-1275-2

Type

conf

DOI

10.1109/ICMA.2012.6284319

Filename

6284319