Equivalent damage-healing approach to residual fatigue life prediction for copper film by laser repair
Source abstract
Abstract
A healing method for fatigue damage was investigated by laser shock peening and laser irradiation with excimer laser for polycrystalline copper film. It is found that the sum of the consumed fatigue ductility and the total fatigue ductility for the damaged specimen after both laser treatments is equal to the total fatigue ductility for the undamaged specimen after both laser treatments. The evolution of the damage healing can be replaced by that for the undamaged specimen after laser treatment. Based on the equivalent fatigue damage evolution, a residual fatigue life prediction method is proposed during the damage-healing process for the copper specimen. The predicted lives by the proposed method agree well with the experimental results.
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Research context
OpenAlex topics: Surface Treatment and Residual Stress · Metal and Thin Film Mechanics · High-Velocity Impact and Material Behavior
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Mechanical Engineering and Applied Electronics Technology, Institute of Laser Engineering, Beijing University of Technology, Beijing, P. R. China
Institute of Laser Engineering, Beijing University of Technology, Beijing, P. R. China
Department of Mechanical Engineering, The University of Alabama, Tuscaloosa, AL, USA
Department of Aerospace Engineering and Mechanics, The University of Alabama, Tuscaloosa, AL, USA
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