Investigation of heat treatment parameters effect on the microstructure and on the mechanical properties of a powder metallurgy nickel-base superalloy

Alice Dumont (1) , Loic Nazé (1) , Alain Köster (1) , Luc Rémy (1) , Jean Yves Guedou (2) , Jean-Michel Franchet (2)

1 MAT - Centre des Matériaux
2 SNECMA Villaroche [Moissy-Cramayel]

The relationships between heat treatment parameters and microstructure, and between microstructure and mechanical properties were investigated in the SMO43 disc P/M superalloy. Various heat treatments were applied to this superalloy to determine the effect of the solution temperature on the grain size, and of the cooling path and aging temperature on the ' precipitates distribution. Microstructural features were characterised through the careful study of ' precipitation. Fatigue crack growth tests with dwell time were performed at high temperature for comparison of the mechanical properties of some selected microstructures.

Mots clés: superalloy; heat treatment; microstructure; mechanical properties; fatigue crack growth

Domaines: Sciences de l'ingénieur [physics]; Matériaux

Alice Dumont, Loic Nazé, Alain Köster, Luc Rémy, Jean Yves Guedou, et al.. Investigation of heat treatment parameters effect on the microstructure and on the mechanical properties of a powder metallurgy nickel-base superalloy. 21st international conference on metallurgy and materials, May 2012, Brno, Czech Republic. 6 p. ⟨hal-00732325⟩