材料工程2025，Vol.53Issue(8)：147-156,10.DOI:10.11868/j.issn.1001-4381.2023.000777
激光喷丸-机械喷丸复合强化对GH4169合金表面完整性和振动疲劳性能的影响
Effect of co-strengthening of laser shock peening and mechanical shot peening on surface integrity and vibration fatigue properties of GH4169 alloy
摘要
Abstract
Vibration fatigue specimens are designed based on the load-cases of compressor blades,and performed by mechanical shot peening,laser shock peening,and co-strengthening of laser shock peening followed by mechanical shot peening respectively.Surface integrity parameters such as the surface three-dimensional morphology,the residual stress distribution,the hardness gradient,and the cross-sectional microstructure of surface strengthened GH4169 alloy specimens are characterized using a white light interferometer,X-ray diffraction residual stress tester,microhardness tester,and scanning electron microscope respectively.The influence of surface integrity states on the vibration fatigue performance is studied.The results show that the co-strengthening exhibits the advantages of both shot peening and laser shock peening,eliminating machining marks,introducing high amplitude(1199 MPa)and large depth(330 μm)compressive residual stress profile,and producing a microstructure-hardening layer with a depth exceeding 120 μm and a plastic deformation layer with a depth exceeding 90 μm.Due to the improvement of the surface integrity in co-strengthening,the median fatigue life of co-strengthened specimens increases by 77.6 times,4.0 times,and 14.5 times compared to as-received,mechanically shot peened,and laser shot peened specimens,respectively,resulting in the initiation of fatigue sources from the subsurface layer.关键词
激光喷丸-机械喷丸复合强化/GH4169/表面完整性/振动疲劳寿命Key words
co-strengthening of laser shock peening and mechanical shot peening/GH4169/surface integrity/vibration fatigue life分类
矿业与冶金引用本文复制引用
田凯,吴小燕,李伟,谢超,罗学昆,王欣..激光喷丸-机械喷丸复合强化对GH4169合金表面完整性和振动疲劳性能的影响[J].材料工程,2025,53(8):147-156,10.基金项目
国家自然科学基金项目(52271076) （52271076）
国家科技重大专项(Y2022-Ⅶ-0007-0049,J2019-Ⅶ-0015-0155,P2023-B-Ⅳ-002-001,J2019-Ⅳ-0009-0077) （Y2022-Ⅶ-0007-0049,J2019-Ⅶ-0015-0155,P2023-B-Ⅳ-002-001,J2019-Ⅳ-0009-0077）
