Abstract
Ultrasonic attenuation and the modulus defect were investigated in (111)-deformed copper single crystals. Experimental results were interpreted as resulting from the contribution of two dislocation mechanisms: kink resonance and kink relaxation (stress-induced double-kink formation). Bordoni peak relaxation is described considering no distribution in activation energy or relaxation time. The kink density contributing to the resonance mechanism is shown to be dependent on temperature.
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