J. Phys. Colloques
Volume 48, Numéro C8, Décembre 1987Fifth European Conference on Internal Friction and Ultrasonic Attenuation in Solids
|Page(s)||C8-143 - C8-148|
J. Phys. Colloques 48 (1987) C8-143-C8-148
THE INTERNAL FRICTION BEHAVIOUR OF A COLD-WORKED Al-Mg-Si ALLOY AT 1 HzE. BERTLING-BERRENS1, P.G. McCORMICK2, G. SOKOLOWSKI1 et K. LÜCKE1
1 Institut für Allgemeine Metallkunde und Metallphysik der RWTH, D-5100 Aachen, F.R.G.
2 Department of Mechanical Engineering, University of Western Australia, Perth 6009 Nedlands, Australia
A commercial Al-Mg-Si alloy has been used for the present investigation. After tensile deformation at about 100 K modulus and decrement have been measured simultaneously between 100 and 400 K with a torsion pendulum. The internal friction effects were found to be not very reproducible from sample to sample. However, continuous dislocation pinning between 90 and 300 K and two pinning stages between 300 and 350 K were observed. The deformation-induced damping peaks appeared between 115 and 265 K. Their annealing behaviour has been investigated. All peaks disappeared after annealing at 400 K.