J. Phys. IV France 08 (1998) Pr8-55-Pr8-61
Length scale effects on the geometric softening of precipitated single crystalsE.P. Busso1, F. Meissonnier1, N.P. O'Dowd1 and D. Nouailhas2
1 Department of Mechanical Engineering, Imperial College of Science, Technology and Medicine, University of London, London SW7 2BX, U.K.
2 Structures and Damage Mechanics Department, ONERA, 29 avenue de la Division Leclerc, 92320 Châtillon cedex, France
The understanding of the conditions under which inelastic deformation evolves in precipitated γ/γ' single crystal materials requires analytical and numerical frameworks which incorporate both time and spatial-dependent behaviour. In this work, an existing rate-dependent crystallographic formulation is employed to investigate the effect of the normalised length scale associated with the soft γ channel width on the geometric softening caused by the activation of additional slip systems due to large lattice rotations.
© EDP Sciences 1998