Internal friction and modulus associated with non-equilibrium diffusion-type phase transformation in an Al-Zn alloy

Abstract

The characteristics of the aging internal friction and modulus associated with the non-equilibrium phase transformation were investigated in an as-quenched eutectoid Al-Zn alloy. It was observed that the loss of stability in the lattice during spinodal pretransition did not induce any localised soft modulus effect and there were two aging internal friction peaks during the phase transition. These results are discussed.