Influence of Remaining Impurity Concentration on the Internal Friction After Cyclic Deformation in Pure Aluminium

Abstract

The characteristic internal friction peak of low temperature (78K) cyclic deformation in Aluminium has been studied. The peak can be explained by an interaction dislocation-dislocation loop (1). The height of this peak depends on the type and the concentration of impurities and its evolution with annealing temperature can be understood by supposing a diffusion mechanism of dislocation loops and impurities