Influence of temperature and strain on the amplitude-dependent internal friction of high-purity aluminum |
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| Authors: | S N Golyandin K V Sapozhnikov Yu A Emel’yanov A B Sinani S P Nikanorov S B Kustov W H Robinson |
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| Institution: | (1) A. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia;(2) Institute de Génie Atomique, Département de Physique, école Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland;(3) Penguin Engineering Ltd. (PEL), P.O. Box 33, 093 Petone, New Zealand |
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| Abstract: | The dislocation amplitude-dependent friction (ADIF) of high-purity (99.999%) polycrystalline aluminum is investigated in the
temperature range 7–300K at vibrational strain amplitudes of 10−7–10−4 for samples in the annealed and deformed (by quasistatic, shock, and ultrasonic loading) states. The ADIF is a multistage
effect in the indicated temperature and vibration amplitude ranges. Analysis of the amplitude-temperature spectra of the ADIF
permits separation of components attributable to: interaction between dislocations, the interaction of dislocations with pinning
points, and pure dislocation relaxation (the interaction of dislocations with the Peierls relief). ADIF is observed to depend
nonmonotonically on the initial quasistatic strain determined by strain hardening and recovery processes.
Fiz. Tverd. Tela (St. Petersburg) 40, 1839–1844 (October 1998) |
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