The Paton Welding Journal, 2005, №06

2005 №06 (11)

2005 №06 (02)

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The Paton Welding Journal, 2005, #6, 2-5 pages

Investigation of weldability of nickel superalloys and development of repair technology for gas turbine blades

K.A. Yushchenko¹, V.S. Savchenko¹, L.V. Chervyakova¹, S. David¹, J. Vitek²

¹E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.
²Oak Ridge National Laboratory, Oak Ridge, USA

Abstract
The paper describes studies on evaluation of weldability of nickel-base superalloys applied in manufacture of gas turbine blades. The content of the strengthening γ′-phase in the alloys reaches 60 %. A technology is proposed for repair of blades by plasma powder cladding.
Keywords: plasma powder cladding, nickel superalloys, gas turbine blades, strengthening γ′-phase, ductility dip, repair technology

References

1. Sims, C.T., Stoloff, N.S., Hagel, W.C. (1995) Superalloys II. New York: Wiley-Interscience Publ.
2. Savage, W.F., Lundin, G.D. (1965) The Varestraint test. Welding J., 44(10), 433–442.
3. Bukhanova, A.A., Toloraja, V.N. (1984) On structure and properties of single crystals of heat-resistant nickel-base alloys. In: High-temperature and heat-resistant steels and nickel-base alloys. Moscow: Nauka.
4. Park, I.W., Babu, S.S., Vitek, I.M. et al. (2003) Stray grain formation in single crystal Ni-base superalloy welds. J. Appl. Phys., 94(6), 4203–4209.
5. Savchenko, V.S., Yushchenko, K.A., Makhnenko, V.I. et al. (1993) Effect of physical characteristics of cast heat-re¬sistant nickel alloys on development of thermal-deformation processes in fusion welding. Avtomatich. Svarka, 11, 6–9.

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Suggested Citation

K.A. Yushchenko, V.S. Savchenko, L.V. Chervyakova, S. David, J. Vitek (2005) Investigation of weldability of nickel superalloys and development of repair technology for gas turbine blades. The Paton Welding J., 06, 2-5.

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