Abstract
The relaxation peaks, labelledPy andPx by Sommer and Beshers, observed at low temperature in high-purity cold-worked nickel, have been studied after deformation at room temperature. The variations ofPy heightvs. the amount of deformation ep and the evoluation of this peak after isochronal annealings have been investigated. The activation energy has been determined in a wide frequency range (1 kHz to 4 MHz). All these results agree to point out thatPy is really a Bordoni peak. The temperature shift of the peak with annealing complies with the Seeger-Engelke analysis. ConcerningP∞, its behaviour with deformation and its stability with annealing have been studied. The activation energy is determined.
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