Microstructural changes during recrystallization of powder-consolidated nickel-base superalloy IN-100

Authors: Menzies, R. G.; Davies, G. J.; Edington, J. W.

Source: Metal Science, Volume 15, Number 5, May 1981 , pp. 217-224(8)

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Abstract:

The microstructural changes that occur during static annealing at 1311K of the nickel-base superalloy IN-100 are described. Samples were prepared from an extruded powder consolidate which had been worked in the temperature range 1348–1388 K. The microstructure was examined in detail in the as-extruded condition and after static annealing for 1.5 h at 1311K using both transmission and scanning electron microscopy. Additionally, the microstructures of specimens deformed superplastically at 1311K were examined, and showed that both the ?- and ??-phases recrystallize and that recrystallization is initiated near prior particle boundaries where high localized strains and diffusion rates exist. Recrystallization is seen to advance on a well defined front. A mechanism for recrystallization is proposed which accounts for the present observations.

Document Type: Research Article

Publication date: 1981-05-01

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