THE INTERNAL FRICTION BEHAVIOUR OF A COLD-WORKED Al-Mg-Si ALLOY AT 1 Hz E. BERTLING-BERRENS, P.G. McCORMICK, G. SOKOLOWSKI et K. LÜCKE J. Phys. Colloques, 48 C8 (1987) C8-143-C8-148 DOI: 10.1051/jphyscol:1987818