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) C7-347 - C7-350
DOI http://dx.doi.org/10.1051/jp4:1993753
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) C7-347-C7-350

DOI: 10.1051/jp4:1993753

Effect of a long-term prior aging on the tensile behaviour of a high-performance single crystal superalloy

M. PESSAH-SIMONETTI, P. CARON and T. KHAN

ONERA, BP. 72, 92322 Châtillon cedex, France


Abstract
The influence of long-term aging heat treatments on the tensile behaviour of <001> single crystals of the MC2 nickel-based superalloy was investigated at room temperature, 650 and 950°C. The precipitation of brittle particles of a W-rich µ phase did not induce any deleterious effect on the tensile strength and ductility. The decrease in yield strength and the increase in ductility were attributed to the coarsening of the γ' strengthening particles which promotes by-passing of the precipitates by matrix dislocations and the homogeneization of deformation.



© EDP Sciences 1993