| Numéro |
J. Phys. Colloques
Volume 48, Numéro C8, Décembre 1987
Fifth European Conference on Internal Friction and Ultrasonic Attenuation in Solids
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| Page(s) | C8-137 - C8-142 | |
| DOI | https://doi.org/10.1051/jphyscol:1987817 | |
Fifth European Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 48 (1987) C8-137-C8-142
DOI: 10.1051/jphyscol:1987817
Institut für Allgemeine Metallkunde und Metallphysik der RWTH, D-5100 Aachen, F.R.G.
J. Phys. Colloques 48 (1987) C8-137-C8-142
DOI: 10.1051/jphyscol:1987817
IMPURITY EFFECTS ON THE RECOVERY OF COPPER STUDIED BY ULTRASONIC ATTENUATION MEASUREMENTS UNDER CYCLIC BIAS STRESS
C. BECKER, D. LENZ et K. LÜCKEInstitut für Allgemeine Metallkunde und Metallphysik der RWTH, D-5100 Aachen, F.R.G.
Abstract
High purity Cu single crystals doped with Mg, Ag, Pb, Sb,
Bi (20-50 ppm) were isochronally annealed between 373 K and 923 K after 0.12%
deformation at room temperature. After each annealing step the dependence of
sound attenuation on frequency (10 - 200 MHz) and bias stress (cyclic
compression/tension ; peak amplitudes below plastic yield) was measured. From
the latter experiment specific information on the solute diffusion towards the
dislocations and their pinning strength is obtained. From the frequency
dependence of attenuation the dislocation pinning point density and the
recovery of dislocation density as a function of temperature and type of solute
is derived.