ANOMALOUSLY AMPLITUDE-DEPENDENT INTERNAL-FRICTION PEAKS IN ALUMINIUM CONTAINING 0.12 wt % OF MAGNESIUM Q.F. FANG et T.S. KÊ J. Phys. Colloques, 46 C10 (1985) C10-227-C10-230 DOI: 10.1051/jphyscol:19851051