Numéro
J. Phys. IV France
Volume 03, Numéro C7, Novembre 1993
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
Page(s) C7-1019 - C7-1027
DOI http://dx.doi.org/10.1051/jp4:19937159
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés

J. Phys. IV France 03 (1993) C7-1019-C7-1027

DOI: 10.1051/jp4:19937159

Assemblage métallurgique des pièces moteurs. Soudage par friction inertielle de disques de compresseur HP en superalliage de nickel

J.-P. FERTE

SNECMA, BP. 81, 91003 Evry cedex, France


Abstract
The main part of this paper describes upside metallurgical and mechanical work done at SNECMA,on inertia welding of powder metallurgy nickel base superalloys ASTROLOY and N18, allowing appliance of this process to engine parts : Inertia welding of superalloys leads to deap microstructural changes in the H.A.Z which have been, as well as upset. correlated to process parameters, weld geometry and base material microstructure ; a full mechanical testing of welds shown properties equivalent to base material ones up to 650 °C except for fatigue crack growth behavior under specific conditions (T>600°c-hold time at maximum load) which is drastically reduced for in weld plane propagation. A significant improvement of this later property has been done through post-welding heat treatment and optimization of welding parameters. Last part of this paper summarize the main teachings gained, on the complete welding procedure, from welding of scale one parts.



© EDP Sciences 1993