The influence of Al content on the Zener relaxation of Fe–Al alloys

Abstract

The effect of Al content on the Zener relaxation peak of annealed Fe–Al alloys has beeninvestigated using a computer-controlled automatic inverted torsion pendulumthrough the method of free decay and forced vibration. It has been shown thatalloys with medium Al contents show strong relaxation while lower or higher Alcontents lead to relatively weak Zener relaxation peaks. The Zener relaxation inFe–Al alloys originates from the next-nearest-neighbour atom pairs and theirinteraction rather than the nearest-neighbour atom pairs. The latter may notproduce Zener relaxation because of the ordered structure, which suppresses Zenerrelaxation.