Sn. Golyandin et al., INFLUENCE OF TEMPERATURE AND STRAIN ON THE AMPLITUDE-DEPENDENT INTERNAL-FRICTION OF HIGH-PURITY ALUMINUM, Physics of the solid state, 40(10), 1998, pp. 1667-1671
The dislocation amplitude-dependent friction (ADIF) of high-purity (99
.999%) polycrystalline aluminum is investigated in the temperature ran
ge 7- 300 K at vibrational strain amplitudes of 10(-7)-10(-4) for samp
les in the annealed and deformed (by quasistatic, shock, and ultrasoni
c loading) states. The ADIF is a multistage effect in the indicated te
mperature and vibration amplitude ranges. Analysis of the amplitude-te
mperature spectra of the ADIF permits separation of components attribu
table to: interaction between dislocations, the interaction of disloca
tions with pinning points, and pure dislocation relaxation (the intera
ction of dislocations with the Peierls relief). ADIF is observed to de
pend nonmonotonically on the initial quasistatic strain determined by
strain hardening and recovery processes. (C) 1998 American Institute o
f Physics. [S1063-7834(98)01510-X].