Effect of laser shock processing on the mechanical properties and fatigue lives of the turbojet engine blades manufactured by LY2 aluminum alloy

Zhang, Y.K.; Lu, Jinzhong; Ren, Xudong; Yao, Hongbing; Yao, Hongxing

doi:10.1016/j.matdes.2008.07.017

Cited by 123 publications

(44 citation statements)

References 26 publications

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“…The result is just like that of the conventional laser surface texturing technique [17,18], which produces microdimples on a target surface through laser ablation. Additionally, laser shock processing also can change the surface roughness of metal targets [13,19,20]. About this problem, we note that some researchers have found that LSP can deteriorate the surface roughness [19], while some others have found that the roughness could be improved [13,20].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the crater-like microdefects induced by laser shock processing with aluminum foil as absorbent layer

Xuan

Lian

et al. 2015

Applied Surface Science

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Section: Introductionmentioning

confidence: 99%

Investigation of the crater-like microdefects induced by laser shock processing with aluminum foil as absorbent layer

Xuan

Lian

et al. 2015

Applied Surface Science

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“…In Zhang's [75] studies, turbine blades consisting of LY2 aluminum alloy were strengthened using LSP. The depth of the plastic deformation layer was greater than 2 mm, and compressive residual stress and micro-hardness were significantly improved.…”

Section: Laser Shot Peeningmentioning

confidence: 99%

Machining the Integral Impeller and Blisk of Aero-Engines: A Review of Surface Finishing and Strengthening Technologies

Gao

Wang

et al. 2017

Chin. J. Mech. Eng.

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The integral impeller and blisk of an aero-engine are high performance parts with complex structure and made of difficult-to-cut materials. The blade surfaces of the integral impeller and blisk are functional surfaces for power transmission, and their surface integrity has significant effects on the aerodynamic efficiency and service life of an aero-engine. Thus, it is indispensable to finish and strengthen the blades before use. This paper presents a comprehensive literature review of studies on finishing and strengthening technologies for the impeller and blisk of aero-engines. The review includes independent and integrated finishing and strengthening technologies and discusses advanced rotational abrasive flow machining with back-pressure used for finishing the integral impeller and blisk. A brief assessment of future research problems and directions is also presented.

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“…When the peak pressure of the shock wave exceeds the dynamic yield strength of alloys or metallic materials, plastic deformation occurs, resulting in the improvement of the near-surface microstructure and mechanical properties, which is accompanied by significant changes in microstructures and phases. Shock waves can produce one or the combination of the following metallurgical effects: generation of point defects, dislocations and twins, phase transformations and precipitation [30,31]. The changes in microstructure, induced by laser beam action, are typical for this superalloy and can be summarized as formation of carbides, TiC, CrC and (Ti, Mo)C, that segregate both at the grains and at the grain boundaries [32].…”

Section: Laser Shock Peening Of Nimonic 263 At 1064 Nm Wavelengthmentioning

confidence: 99%

Picosecond Laser Shock Peening of Nimonic 263 at 1064 nm and 532 nm Wavelength

Petronić

Šibalija

Burzić

et al. 2016

Metals

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Abstract:The paper presents a study on the surface modifications of nickel based superalloy Nimonic 263 induced by laser shock peening (LSP) process. The process was performed by Nd 3+ :Yttrium Aluminium Garnet (YAG) picosecond laser using the following parameters: pulse duration 170 ps; repetition rate 10 Hz; pulse numbers of 50, 100 and 200; and wavelength of 1064 nm (with pulse energy of 2 mJ, 10 mJ and 15 mJ) and 532 nm (with pulse energy of 25 mJ, 30 mJ and 35 mJ). The following response characteristics were analyzed: modified surface areas obtained by the laser/material interaction were observed by scanning electron microscopy; elemental composition of the modified surface was evaluated by energy-dispersive spectroscopy (EDS); and Vickers microhardness tests were performed. LSP processing at both 1064 nm and 532 nm wavelengths improved the surface structure and microhardness of a material. Surface morphology changes of the irradiated samples were determined and surface roughness was calculated. These investigations are intended to contribute to the study on the level of microstructure and mechanical properties improvements due to LSP process that operate in a picosecond regime. In particular, the effects of laser wavelength on the microstructural and mechanical changes of a material are studied in detail.

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Effect of laser shock processing on the mechanical properties and fatigue lives of the turbojet engine blades manufactured by LY2 aluminum alloy

Cited by 123 publications

References 26 publications

Investigation of the crater-like microdefects induced by laser shock processing with aluminum foil as absorbent layer

Investigation of the crater-like microdefects induced by laser shock processing with aluminum foil as absorbent layer

Machining the Integral Impeller and Blisk of Aero-Engines: A Review of Surface Finishing and Strengthening Technologies

Picosecond Laser Shock Peening of Nimonic 263 at 1064 nm and 532 nm Wavelength

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