Effect of low-temperature deformation on internal friction peaks of irradiated Al alloys

Abstract

The effect of deformation after fast neutron irradiation at low temperatures on the internal friction peaks is studied. The peak height in internal friction is reduced largely by deformation. The degree of reduction in the peak height with increasing degree of deformation is similar for each peak. The strain field of moving dislocations may be able to transform interstitial–solute complexes into ones having a configuration that does not give rise the relaxation peaks.

New Peak in Internal Friction after Deformation of Irradiated Al Alloys

“…On the other hand, the relaxation processes of point defects are influenced by the presence of dislocations. By deformation after irradiation, the peak height due to radiation induced defects decreases remarkably [3]. This reduction could be caused either by the fact that equivalent positions for jumping of point defect complexes are changed to inequivalent ones by the strain field of dislocations or the strain field of moving dislocations transforms complexes into ones having a configuration that does not give rise to a relaxation peak.…”