Low frequency mechanical study on phase transformation in Cu-Al-Be

The low frequency mechanical properties were investigated by measurement of internal friction (IF) in Cu-Al-Be alloy. The IF and its dependence of the measuring frequency and amplitude during temperature variation and under i sothermal condition were investigated by an inverted torsion pendulum. The IF peak associated with the martensitic transformation and the change of th e sub-structure in low temperature phase were obtained in Cu-Al-Be alloy. B ased on the dependence of measuring frequency and temperature rate, the mec hanism of IF peaks are discussed.