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Low Temperature Internal Friction of Aluminum at 1 Hz
Author(s) -
Routbort J. L.,
Sack H. S.
Publication year - 1967
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19670220125
Subject(s) - materials science , annealing (glass) , activation energy , internal friction , aluminium , irradiation , deformation (meteorology) , shear (geology) , relaxation (psychology) , condensed matter physics , composite material , nuclear physics , physics , chemistry , psychology , social psychology
The internal friction and shear modulus of single and polycrystals of Al were measured of 1 Hz from 4.2 to 300 °K as a function of the amount of deformation, temperature at deformation, and gamma irradiation. Two Bordoni peaks were found with activation energies of (0.16 ± 0.01)eV and (0.26 ± 0.03) eV, and attempt frequencies of 5 × 10 (12 ± 0.6) s −1 and 3 × 10 (14 ± 1.3) s −1 , respectively. The low temperature peak has a single attempt frequency, but a distribution of activation energies, while the process contributing to the other peak involves a distribution of attempt frequencies, and possibly a single activation energy. Gamma irradiation at low temperature does not effect these peaks. The relaxation strengths of the processes are a function of temperature. The annealing behavior of the Bordoni and other peaks found after low temperature deformation was also studied.