Numéro
J. Phys. IV France
Volume 04, Numéro C3, Février 1994
36ème Colloque de Métallurgie de l'INSTN
CHANGEMENTS DE PHASES ET MICROSTRUCTURES
Page(s) C3-105 - C3-110
DOI http://dx.doi.org/10.1051/jp4:1994314
36ème Colloque de Métallurgie de l'INSTN
CHANGEMENTS DE PHASES ET MICROSTRUCTURES

J. Phys. IV France 04 (1994) C3-105-C3-110

DOI: 10.1051/jp4:1994314

Relation entre les propriétés structurales et la morphologie des précipités γ' du superalliage monocristallin à base de nickel AM1

A. ROYER1, P. BASTIE1, D. BELLET1 and C.M.E. ZEYEN2

1  Laboratoire de Spectrométrie Physique, URA 8 du CNRS, Université Joseph Fourier - Grenoble I, BP. 87, 38402 Saint Martin d'Hères cedex, France
2  Institut Laue-Langevin, BP. 156, 38042 Grenoble cedex 9, France


Abstract
Measurements of the distortion of the lattice cells and of the lattice parameter mismatch between the γ and γ' phases of two AM1 single crystal superalloy samples with different morphology of the precipitates are reported as a function of temperature. They show that these quantities are strongly inffuenced by the shape and the size of the precipitates and are not intrinsic properties of the alloy. The dilatation of each phase is deduced from the study of the crept sample and allows to propose a scheme for the evolution of the lattice parameter of the heat-treated sample. In particular a cross over from an elastic accommodation to a plastic relaxation is evidenced.



© EDP Sciences 1994