| 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) | C8-329 - C8-333 | |
| DOI | https://doi.org/10.1051/jphyscol:1987848 | |
Fifth European Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 48 (1987) C8-329-C8-333
DOI: 10.1051/jphyscol:1987848
1 Kossuth University, Department of Solid State Physics, PO Box 2, H-4010 Debrecen, Hungary
2 Ecole Polytechnique Fédérale de Lausanne, Institut de Génie Atomique, PHB Ecublens, CH-1015 Lausanne, Switzerland
J. Phys. Colloques 48 (1987) C8-329-C8-333
DOI: 10.1051/jphyscol:1987848
TIME AND HEATING RATE DEPENDENT CONTRIBUTIONS IN THE INTERNAL FRICTION
S. KISS1, W. BENOIT2, I.Z. HARANGOZÓ1, F.J. KEDVES1, G. POSGAY1 et R. SCHALLER21 Kossuth University, Department of Solid State Physics, PO Box 2, H-4010 Debrecen, Hungary
2 Ecole Polytechnique Fédérale de Lausanne, Institut de Génie Atomique, PHB Ecublens, CH-1015 Lausanne, Switzerland
Abstract
The internal friction (i.f.) background of pur Al and
Al-alloys, is higher for higher heating or cooling rates. Heating rate or time
dependent effects were also found in the case of precipitation or dissolution
(AlAg, AlCu, AlZn, recrystallization, or stuctural relaxation (metallic
glasses). One part of these changes can be attributed to continuous
transformation of the structure which can be monitored mainly by the change of
the modulus. Also an extra damping was detected depending on the intensity of
the transformation processes.