Laser peening is an emerging technology for the surface treatment of metallic materials that is capable of enhancing resistance to fatigue failure. This paper presents results quantifying the effects of laser peening on residual stress and fatigue performance of samples machined from 7050-T7451 aluminum alloy. Residual stress distributions were measured for treatment with different laser peening parameter sets using the slitting method. For particular laser peening parameter sets, stress versus life data were generated over a range of applied loads and compared with as-machined and shot peened results. Two different sample types were used for fatigue testing: smooth bend bars and notched bend bars. In general, laser peening produced a fatigue life improvement of approximately 3 to 6 relative to as machined samples and 1.5 to 2 relative to shot peened samples over the range of stress levels tested.
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ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference
July 23–27, 2006
Vancouver, BC, Canada
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
0-7918-4758-6
PROCEEDINGS PAPER
Fatigue Performance of Laser Peened 7050-T7451 Aluminum Alloy
Adrian T. DeWald,
Adrian T. DeWald
University of California at Davis, Davis, CA
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Harold Luong,
Harold Luong
University of California at Davis, Davis, CA
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John E. VanDalen,
John E. VanDalen
University of California at Davis, Davis, CA
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Michael R. Hill
Michael R. Hill
University of California at Davis, Davis, CA
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Adrian T. DeWald
University of California at Davis, Davis, CA
Harold Luong
University of California at Davis, Davis, CA
John E. VanDalen
University of California at Davis, Davis, CA
Michael R. Hill
University of California at Davis, Davis, CA
Paper No:
PVP2006-ICPVT-11-93416, pp. 199-202; 4 pages
Published Online:
July 23, 2008
Citation
DeWald, AT, Luong, H, VanDalen, JE, & Hill, MR. "Fatigue Performance of Laser Peened 7050-T7451 Aluminum Alloy." Proceedings of the ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. Volume 7: Operations, Applications, and Components. Vancouver, BC, Canada. July 23–27, 2006. pp. 199-202. ASME. https://doi.org/10.1115/PVP2006-ICPVT-11-93416
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