Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
J. Phys. IV France 03 (1993) C7-445-C7-448
Strain hardening in Ni3 (Al, Hf)P. SPÄTIG, J. BONNEVILLE and J.-L. MARTIN
Ecole Polytechnique Fédérale de Lausanne, Département de Physique, Institut de Génie Atomique, 1015 Lausanne, Switzerland
A method of repeated stress relaxations is used to determine the strain-hardening that takes place during stress relaxation tests performed at different temperatures and for various crystallographic deformation axises. It is shown that strain hardening for stress relaxation conditions is substantially higher than for constant strain-rate deformation conditions. This behaviour is found to be more and more pronounced with increasing temperatures. It is suggested that strain-hardening is not dislocation substructure dependent but is inherent to dislocation motion.
© EDP Sciences 1993