Advanced Method for Single Crystal Casting of Turbine Blades for Gas Turbine Engines and Plants

A method for fabricating single crystal blades that combines the techniques of seed crystals and selection is suggested. The method realizes the advantages of both techniques, i.e., the high structural perfection and the possibility of fabricating single crystals with specified spatial orientation....

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Bibliographic Details
Published in:Metal science and heat treatment 2002-07, Vol.44 (7-8), p.279-283
Main Authors: Toloraiya, V N, Orekhov, N G, Kablov, E N
Format: Article
Language:English
Subjects:
Blades
Crystal structure
Crystals
Diffraction
Gas turbine engines
Nucleation
Seeds
Single crystals
Turbine blades
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Summary:A method for fabricating single crystal blades that combines the techniques of seed crystals and selection is suggested. The method realizes the advantages of both techniques, i.e., the high structural perfection and the possibility of fabricating single crystals with specified spatial orientation. Metallographic and x-ray diffraction analyses are used to study the processes of nucleation of the single crystal structure of blade castings fabricated from high-temperature nickel alloys by the method of selection and seed crystals. A commercial process for fabricating cast single crystal turbine blades by the new method is suggested.
ISSN:0026-0673
1573-8973
DOI:10.1023/A:1021299619346