The combined climb-detachment process, as controlled by the so-called interfacial pinning of dislocations by attractive incoherent dispersoid particles, was analyzed. The athermal detachment stress was recalculated within the framework of the Fleischer-Friedel weak point-obstacle approximation, and account was taken of the particle-spacing versus climb statistics. The inadequate restrictions of the successful Arzt-Rösler-Wilkinson model could therefore be eliminated. Predicted creep thresholds ranged from 0.13 to 0.45 times Gb/L and were therefore considerably lower than the values of the Arzt-Rösler-Wilkinson estimate.

On the Attractive Particle-Dislocation Interaction in Dispersion-Strengthened Material B.Reppich: Acta Materialia, 1998, 46[1], 61-7