Model for creep threshold stress in precipitation-strengthened alloys with coherent particles

The general climb model for creep threshold stress for dislocations interacting with incoherent particles is modified for the case of coherent precipitates, by taking into account elastic interactions between matrix dislocations and particles due to particle/matrix stiffness and lattice mismatches. The model is in qualitative agreement with experimental data for the Al-Sc system. (C) 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.