THE EFFECT OF STRESS ON THE CREEP BEHAVIOR OF HIGH PURITY ALUMINUM IN THE REGION OF DISLOCATION CLIMB

摘要

The effect of stress on the creep rate in the dislocation climb region was investigated by increasing and decreasing the stress abruptly during the course of primary creep of high purity aluminum. These in-vestigations revealed that a simple functional relationship between creep rate and stress does not exist; the effect of stress on the creep rate depended on the substructure as well as the stress. In general the creep of aluminum under conditions of changes in stress can be resolved qualitatively in terms of dislocation climb models for creep.