Zusammenfassung: | |
Components in aircraft engines and gas turbines are exposed to extreme conditions in order to increase performance and efficiency of the overall engine, hence there is an increasing need for cost-effective and time-efficient repair strategies. Presented here are two novel approaches to the repair of Nickel-based components. The hybrid brazing process involves the application of a repair coating, a nickel-based filler material, a NiCoCrAlY and an aluminium layer, by thermal spraying followed by a heat treatment and combined brazing-aluminizing process. This significantly shortens the conventional repair brazing process and yields superior results. Single-crystal additive repair by laser cladding is applied for the repair of small or large defects in single-crystal turbine blades by enabling monocrystalline solidification of the cladded material by use of a temperature gradient, thereby allowing for the regeneration of these expensive components. The novel approach that combines layer-wise addition of material and laser melting enables the formation of highly monocrystalline structures.
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Lizenzbestimmungen: | CC BY-NC-ND 4.0 Unported - https://creativecommons.org/licenses/by-nc-nd/4.0/ |
Publikationstyp: | Article |
Publikationsstatus: | publishedVersion |
Erstveröffentlichung: | 2018 |
Schlagwörter (englisch): | Brazing, Coating, Hybrid joining, Laser cladding, Nickel-based superalloys, Aircraft engines, Aluminum alloys, Brazing, Chromium alloys, Coatings, Cobalt alloys, Cost effectiveness, Gas turbines, Laser cladding, Nickel alloys, Nickel coatings, Repair, Single crystals, Thermal spraying, Turbine components, Yttrium alloys, Aluminizing process, Cladded materials, Extreme conditions, High pressure turbine blade, Hybrid joining, Monocrystalline structures, Nickel- based superalloys, Single crystal turbine blades, Turbomachine blades |
Fachliche Zuordnung (DDC): | 600 | Technik, 670 | Industrielle und handwerkliche Fertigung |
Kontrollierte Schlagwörter: | Konferenzschrift |
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