Technical Note: Production methods for nickel-based superalloys with improved deformability
by A.G. Shalimov, Y.E. Vasiliev, Y.Y. Reznik, L.P. Sopov, V.I. Eriomenko, O.N. Vlasova, G.M. Rakovshik
International Journal of Materials and Product Technology (IJMPT), Vol. 7, No. 3, 1992

Abstract: At present, superalloy ingots, which can be subjected to deformation, can be produced by the following remelting processes: vacuum arc remelting with forced helium cooling of ingot (VAR), electroslag remelting (ESR), vacuum arc double electrode remelting (VADER). Such processes as electron-beam remelting and plasma-arc remelting also have prospects. This paper compared the quality of nickel-base superalloy operating at 750°C, produced by different methods, i.e. VAR, ESR, ESR + VADER. Investigations of ingot structure showed the presence of microporosity linked with formation of excess phases of eutectic origin, carbides and borides.

Online publication date: Thu, 04-Nov-2010

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