Development and Application of Laser Shock Processing

Wei, 李伟 Li; Yinghong, 李应红 Li; Weifeng, 何卫锋 He; Qipeng, 李启鹏 Li

doi:10.3788/lop20084512.0015

Cited by 14 publications

(4 citation statements)

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“…After the laser shock processing, its fatigue strength is up to 413.7 MPa, which exceeds the design requirements of 379MPa. Currently, LSP has been used in engine production line for F119-PW-100, then LSP was also used in civil aircraft leaves treatment of the Boeing 777 [9]. Y.K.…”

Section: Research Status Of Laser Shock Processingmentioning

confidence: 99%

Research Advance in Laser Shock Processing Surface Modification Technology on Metal Alloys

Zhang

Chen

2010

AMM

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Laser shock processing is an innovative surface treatment technique to strengthen metals. This process induces a compressive residual stress field which increases fatigue crack initiation life and stress corrosion cracking (SCC) resistance and reduces fatigue crack growth rate. The current status of research and development on laser shock processing of metals, using Q-switched high power lasers is reviewed. Then several key issues are addressed, including the development of the laser peening equipment and the opaque overlay selection and so on. Results to date indicate that laser peening has great potential as a means of improving the mechanical performance of components.

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Section: Research Status Of Laser Shock Processingmentioning

confidence: 99%

Research Advance in Laser Shock Processing Surface Modification Technology on Metal Alloys

Zhang

Chen

2010

AMM

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“…. The strengthening layer is formed on the target surface after laser shot peening, which can effectively inhibit the initiation and propagation of surface microcracks and improve the strength and service life of the parts [5]. Therefore, laser shot peening has wide application prospects in aircraft maintenance.…”

Section: Introductionmentioning

confidence: 99%

Influence of Laser Shot Peening Parameters on the Surface Hardness and Roughness of 7075 Aluminum Alloy

Zhang

Cheng

Xia

et al. 2018

MSF

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The laser shot peening has the widely application prospect in aircraft structural parts repairment. The influence of laser shot peening parameters on the surface hardness and surface roughness has guiding significance for laser shot peening process. The variation law of surface hardness and surface roughness in the peening area of 7075 aluminum alloy were obtained based on the experiment research. The results show that the surface hardness improves effectively after laser shot peening, and the maximum hardness is 205.4HV, which is improved by 19.49% compared with the original hardness. Besides, the surface roughness of the rough specimen decreases; whereas, those of the smooth specimen increases after laser shot peening. However, both the surface hardness and surface roughness tend to be saturated when the impact times exceeds 3 times or the overlap rate exceeds 50%. Therefore, a good repairment effect can be obtained with 3 impact times and 50% overlap rate for the 7075 aluminum alloy specimen.

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“…Aiming at this problem, how laser shock peening(LSP) infect the K403 alloy is studied and analyzed in this paper and the influence regulation by LSP on the microstructure, microhardness, residual stress and surface roughness of the K403 alloy is investigated, which provides certain theory foundation for further reasearch LSP improves the fatigure life of the K403 alloy blade. LSP is an innovative surface treatment technique [2,3] , which can produce high magnitude compressive residual stresses in material surface to inhibe the initiation and development of fatigue cracks and improve microhardness, fatigue performance, abrasion performance and stress decay performance of metallic compeonents [4][5][6][7] . A schematic configuration of LSP process on a metal plate is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Effect of Laser Shock Peening on the Structure and Prosperity of K403 Alloy

Chai

et al. 2014

AMM

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To solve the crack and fracture problem in blade made of K403 alloy, the samples of K403 are laser shock processed and then the microstructure, microhardness, residual compressive stress and surface roughness of the samples are tested. The test results show that some grains are observed refined in the grain boundary of shock region, the microhardness improves in a depth of 0.8mm from the surface and the surface microhardness improves 16%, a residual compressive stress which is more than 450MPa is developed in a depth of 1mm from the surface, and obvious changes of the surface roughness are not tested.

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Development and Application of Laser Shock Processing

Cited by 14 publications

References 0 publications

Research Advance in Laser Shock Processing Surface Modification Technology on Metal Alloys

Research Advance in Laser Shock Processing Surface Modification Technology on Metal Alloys

Influence of Laser Shot Peening Parameters on the Surface Hardness and Roughness of 7075 Aluminum Alloy

Effect of Laser Shock Peening on the Structure and Prosperity of K403 Alloy

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