The Paton Welding Journal, 2004, №08

2004 №08 (07)

2004 №08 (09)

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The Paton Welding Journal, 2004, #8, 34-38 pages

Character of formation of hot cracks in welding cast heat-resistant nickel alloys

K.A. Yushchenko, V.S. Savchenko, N.O. Chervyakov, A.V. Zvyagintseva

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

Abstract
Mechanisms of formation of hot cracks in HAZ during fusion welding have been studied. It is presumed that heating of the HAZ metal of a heat-resistant alloy during welding causes structural transformations of the strengthening ′-phase, accompanied by changes in metal volume. Hot cracks are induced by the deformation processes localised in a narrow zone, where the nickel alloy structure remains fully austenitic for a certain period of time
Keywords: heat-resistant nickel alloys, ′-phase, heat-affected zone, hot cracks, hardness, plastic deformation, ductilitydip range

References

1. Haafkens, M.H., Matthey, J.G. (1982) A new approach to the weldability of nickel-base as-cast and powder metallurgy superalloys. Welding J., 61(11), 25–30.
2. Maslenkov, S.B. (1983) Heat-resistant steels and alloys. Moscow: Metallurgiya

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Suggested Citation

K.A. Yushchenko, V.S. Savchenko, N.O. Chervyakov, A.V. Zvyagintseva (2004) Character of formation of hot cracks in welding cast heat-resistant nickel alloys. The Paton Welding J., 08, 34-38.

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