On some advanced nickel-based superalloys for disk applications

D. Locq (1) , P. Caron (1)

1 ONERA - The French Aerospace Lab [Châtillon]

Recent works performed at ONERA on nickel-based superalloys for disk applications are presented. In the first section, disk characteristics and metallurgical routes used to produce these specific aero-engine components are reviewed. Then, two alloy development programmes carried out to satisfy the requirements of the industrial partners are detailed. Finally, the results of studies aiming at identifying the complex relationships linking the microstructure and the creep behaviour of disk superalloys are described: i) influence of the strengthening gamma prime precipitation on the deformation micromechanisms, and ii) effect of the microstructure on the grain boundary sliding.

Mots clés: SUPERALLOY; DISK; POWDER METALLURGY; ALLOY DESIGN; MICROSTRUCTURE; CREEP; MECHANICAL PROPERTY; GRAIN BOUNDARY SLIDING; DISLOCATION

Domaines: Matériaux

D. Locq, P. Caron. On some advanced nickel-based superalloys for disk applications. Aerospace Lab, 2011, 3, p. 1-9. ⟨hal-01183624⟩