Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
J. Phys. IV France 03 (1993) C7-629-C7-634
Extension of an anisotropic creep model to general high temperature deformation of a single crystal superalloyL.-M. PAN1, R.N. GHOSH2 and M. McLEAN1
1 Department of Materials, Imperial College of Science, Technology [MATH] Medicine, Prince Consort Road, London SW7 2BP, U.K.
2 National Metallurgical Laboratory, Jamshedpur, Bihar 831007, India
A physics based model has been developed that accounts for the principal features of anisotropic creep deformation of single crystal superalloys. The present paper extends this model to simulate other types of high temperature deformation under strain controlled test conditions, such as stress relaxation and tension tests at constant strain rate in single crystals subject to axial loading along an arbitrary crystal direction. The approach is applied to the SRR99 single crystal superalloy where a model parameter database is available, determined via analysis of a database of constant stress creep curves. A software package has been generated to simulate the deformation behaviour under complex stress-strain conditions taking into account anisotropic elasticity.
© EDP Sciences 1993