Single-crystal turbine blade tip repair by laser cladding and remelting

Kaierle, Stefan; Overmeyer, Ludger; Alfred, Irene; Rottwinkel, Boris; Hermsdorf, Jörg; Wesling, Volker; Weidlich, Nils

doi:10.1016/j.cirpj.2017.04.001

Cited by 106 publications

(33 citation statements)

References 2 publications

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“…High-pressure single-crystal turbine blades made of Ni-based superalloys have superior creep and fatigue properties with respect to the polycrystalline ones and, accordingly, they can sustain temperatures up to 1100 °C. However, as a consequence of the extreme conditions in the engine of High-pressure single-crystal turbine blades made of Ni-based superalloys have superior creep and fatigue properties with respect to the polycrystalline ones and, accordingly, they can sustain temperatures up to 1100 • C. However, as a consequence of the extreme conditions in the engine of commercial airplanes, they undergo erosion and cracking [90,99,100]. Kaierle et al demonstrated that the DED process had promising results in the building-up of a single crystal or directionally solidified structures, while laser remelting could be used to extend this monocrystalline height [99].…”

Section: Repaired By Thermal Spraymentioning

confidence: 99%

Application of Directed Energy Deposition-Based Additive Manufacturing in Repair

et al. 2019

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In the circular economy, products, components, and materials are aimed to be kept at the utility and value all the lifetime. For this purpose, repair and remanufacturing are highly considered as proper techniques to return the value of the product during its life. Directed Energy Deposition (DED) is a very flexible type of additive manufacturing (AM), and among the AM techniques, it is most suitable for repairing and remanufacturing automotive and aerospace components. Its application allows damaged component to be repaired, and material lost in service to be replaced to restore the part to its original shape. In the past, tungsten inert gas welding was used as the main repair method. However, its heat affected zone is larger, and the quality is inferior. In comparison with the conventional welding processes, repair via DED has more advantages, including lower heat input, warpage and distortion, higher cooling rate, lower dilution rate, excellent metallurgical bonding between the deposited layers, high precision, and suitability for full automation. Hence, the proposed repairing method based on DED appears to be a capable method of repairing. Therefore, the focus of this study was to present an overview of the DED process and its role in the repairing of metallic components. The outcomes of this study confirm the significant capability of DED process as a repair and remanufacturing technology.

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Section: Repaired By Thermal Spraymentioning

confidence: 99%

Application of Directed Energy Deposition-Based Additive Manufacturing in Repair

et al. 2019

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“…The LDED process is usually applied to engineered components. Especially, the LDED process has been utilized for coating of layer-materials with wear and corrosion resistance on base materials such as dies and tools 3 , or repairing engineered components and products such as turbine blades [4][5][6] . In addition, processing of compositionally graded materials can be realized by effectively leveraging the LDED system with using multiple powder feeders.…”

Section: Multi-beam Laser Directed Energy Deposition (Multi-beam Ldedmentioning

confidence: 99%

Effects of Laser-Beam Defocus on Microstructural Features of Compositionally Graded WC/Co-Alloy Composites Additively Manufactured by Multi-Beam Laser Directed Energy Deposition

Kunimine

Miyazaki

Yamashita

et al. 2020

Sci Rep

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Establishing processing routes for obtaining metal-matrix composites (MMCs) with uniformly-dispersed reinforcements is one of the main subjects in additively manufactured composite materials to achieve designed microstructures and mechanical properties. Here we report on the microstructural features of compositionally graded WC/Co-alloy composites additively manufactured by multi-beam laser directed energy deposition (multi-beam LDED). For tailoring microstructures of compositionally graded WC/ Co-alloy composites with uniformly-dispersed reinforcements, the combinational method: the laserbeam defocus function in the multi-beam LDED system and granulated powder was attempted. By laser defocusing in the multi-beam LDED system, composites with uniformly-dispersed WC particles in Co alloy matrix was successfully obtained due to melting of Co bond in WC-12 wt.%Co granulated particles. It was found that the laser defocusing of multi-beam lasers affects temperature increase of flying powder during the laser focusing area, resulting in change of processing mode from melt-pool mode to thermal spray mode. The preferable property gradients in the WC/Co-alloy composites could be obtained by controlling the feeding rate of the powders and laser-beam defocus. These experimental results demonstrated the effectiveness of the laser-beam-defocus function in the multi-beam LDED system as a key factor for tailoring microstructures of additively-manufactured functionally graded MMCs with uniformly-dispersed reinforcements.

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“…The main advantage of additive manufacture is to fabricate component of advance alloys which are difficult to machine and or would offer serious tooling problems. In these sectors many systems are subjected to high temperature, high stress and vibration effect, leading to erosion and creep (Kathuria, 2000;Kaierle et al, 2017). A few examples of these are engine bearings, cylindrical liners, valves, gas/steam turbine blades, bearing rings, casings, bearing and bushings for space satellites, rocket nozzles, hypersonic aircrafts and missiles, nuclear and chemical vessels.…”

Section: Aerospace Automotive and Power Generationmentioning

confidence: 99%

An Overview: Laser-Based Additive Manufacturing for High Temperature Tribology

et al. 2019

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Laser-based additive manufacturing (LBAM) is a versatile manufacturing technique, extensively adopted to fabricate metallic components of enhanced properties. The current review paper provides a critical assessment of the fabricated metallic coatings and parts through LBAM-processes [e.g., laser metal deposition (LMD) and selective laser melting (SLM)] for high temperature tribological applications. A succinct comparison of LBAM-fabrication and conventional manufacturing is given. The review provides an insight into the sophisticated application-driven material design for high temperature tribological contacts. The review highlights the major mechanisms behind the improvement in the tribology of the laser-deposits; properties evolving as a consequence of the microstructure, lamellar solid lubricants, sulfides, soft metals, lubricious oxides, and self-lubricating surfaces.

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Single-crystal turbine blade tip repair by laser cladding and remelting

Cited by 106 publications

References 2 publications

Application of Directed Energy Deposition-Based Additive Manufacturing in Repair

Application of Directed Energy Deposition-Based Additive Manufacturing in Repair

Effects of Laser-Beam Defocus on Microstructural Features of Compositionally Graded WC/Co-Alloy Composites Additively Manufactured by Multi-Beam Laser Directed Energy Deposition

An Overview: Laser-Based Additive Manufacturing for High Temperature Tribology

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