The deformation of zirconium-oxygen single crystals

Abstract

The rate-controlling mechanisms for {101̄0}〈112̄0〉 prismatic slip in Zr-O alloy crystals, in the range 77-473°K, have been determined by means of differential strain-rate and differential temperature techniques. Two separate rate-controlling processes occur; below 300°K the rate of deformation is regulated by dislocation-interstitial oxygen atom interactions and at elevated temperatures by the non-conservative motion of vacancy jogs in screw dislocations. These two mechanisms have been found to apply for alloys containing between 135-2000 ppm of oxygen. © 1968.