Development of a novel system for in-situ repair of aeroengine airfoil via pulsed laser ablation

Cha, Dae-Ryong; Gavaldà-Diaz, Oriol; Liao, Zhirong; Gilbert, David Jonathan; Axinte, Dragoş; Kell, James; Norton, Andy; O'Key, Michael A.; Osborne, M.R.; Main, Darren

doi:10.1016/j.jmsy.2020.03.001

Cited by 8 publications

(1 citation statement)

References 26 publications

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“…The field-assisted laser has its limitations, as the size of the workpiece is restricted by the volume of the auxiliary device [ 15 ]. Cha et al [ 16 ] used pulsed laser ablation (PLA) for performing the repair of aeroengine components; in their study, follow-up fractographic and metallurgical analysis indicated that although some microstructural characteristics were different between the repair methods, the incurred surface damage was limited in magnitude to a thin surface layer (<30 μm) and the influence on fatigue life was comparable. In Bernatskyi et al [ 17 ]’s research work, they believed that practical experience in the use of welding to solve this problem has shown the need to search technological solutions associated with increasing the depth of penetration and reducing the area of thermal effect.…”

Section: Introductionmentioning

confidence: 99%

Ti6Al4V Alloy Remelting by Modulation Laser: Deep Penetration, High Compactness and Metallurgical Bonding with Matrix

et al. 2022

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Titanium alloys are famous for their light weight, high strength, and heat- and corrosion-resistant properties. However, the excellent mechanical properties are closely related to its microstructure. Innovative machining operations are required for the welding, surface strengthening, and repairs to ensure the refining of the crystalline structure for improved strength requirements, enhanced mechanical properties, and integrating strength. By direct laser melting on the surface of Ti-6Al-4V alloy, the differences of molten pools under continuous and modulated laser mode were compared in the article. Under the same power, the heat influence zone of the laser pool could be reduced to 1/3 of that of the continuous laser. The deep molten pool could be obtained by a continuous laser by the action of high energy density. The tensile property changed a lot between different depths of melt penetration. A high-density, fine-grain molten pool could be obtained under the action of a high-frequency (20 kHz) modulation laser. The mechanical properties of the tensile sample between different depths of melt penetration, which contained the remelting zone, were close to the substrate. The research conclusions can provide technical support for the development of laser remelting processing technology.

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Section: Introductionmentioning

confidence: 99%