| Citation: | HU Dianyin, WANG Tao, DU Junliang, et al. Coupled laser-shot peening for fatigue strength enhancement method on GH2787 compressor blade[J]. Journal of Aerospace Power, 2025, 40（6）：20240017 doi: 10.13224/j.cnki.jasp.20240017
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Taking a compressor blade made of GH2787 as the research object, an approach of coupling laser shock peening and shot peening was proposed for taking advantages of individual laser shock peening and shot peening. This led to a high level of residual stress and sensitivity inhibition of defects on component surface, so as to comprehensively improve the surface integrity of the blade. The surface integrity and fatigue strength of the strengthened blades were tested, and the coupled laser-shot peening exhibited the most significant effect on compressor blade fatigue strength improvement. The fatigue strength of the coupled laser-shot peened compressor blades was improved by 20.6%, which was further increased to 28.1% after following polishing treatment. The increase of fatigue strength was significantly higher than the individual laser shock peening and shot peening, i.e., 15.9% and 18.3%, respectively. This work provides theoretical basis and data support for the implementation of compressor blade surface strengthening technology and anti-fatigue design.
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