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2005 №05 (01) 2005 №05 (03)

The Paton Welding Journal 2005 №05


The Paton Welding Journal, 2005, #5, 8-9 pages

High-temperature gas corrosion of nickel alloy turbine blades during operation

K.A. Yushchenko, V.S. Savchenko, L.V. Chervyakova, A.V. Zvyagintseva

E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.

Abstract
The character of gas corrosion of power plant blades made from nickel alloy Inconel 738 has been studied. It is shown that redistribution of alloying elements occurs in a narrow zone adjoining the crack surface. Evaluation of microhardness showed the loss of strength taking place in this zone.
Keywords: heat-resistant nickel alloys, gas corrosion, microhardness, grain boundary, diffusion, local crack

References

1. Gryaznov, B.A., Gorodetsky, S.S., Nalimov, Yu.S. et al. (1992) Fatigue of heat-resistant alloys and gas turbine engine blades. Kiev: Naukova Dumka. 2. Keiji, S., Zukio, T. (1991) Cracking by elevated temperature embrittlement in the HAZ of alloy 800H. Transact. of Jap. Weld. Soc., 22(1), 10–15.

Suggested Citation

K.A. Yushchenko, V.S. Savchenko, L.V. Chervyakova, A.V. Zvyagintseva (2005) High-temperature gas corrosion of nickel alloy turbine blades during operation. The Paton Welding J., 05, 8-9.