STRUCTURE OF COLD-WORKED METALS AS DEDUCED FROM ANELASTIC MEASUREMENTS

<正> An attempt was made to interpret the structure of cold-worked metals in terms of the associatedanelastic behavior.The specimen used in the study was 99.991 percent aluminum which was heavilycold-worked but partly recovered.Analysis showed that under the conditions of the experiments,namely,prior stabilization and low stress levels,measuremenst of creep under constant stress agreewith the internal friction measurements previously reported.The creep curves obtained showed severalstriking features.The most striking feature of the data is the complete recoverability of the creep.Wecould thus conclude that no irreversible processes were occurring.such as the generation of dislocations.The second important feature is the large magnitude of the recoverable creep,being almost ten timesthe corresponding elastic deformation. The consideration of a heterogeneous network of slip bands in cold-worked metals led to a creepformula which closely represents the creep curves obtained.As the interpretation in terms of adi