Internal friction behaviour of the solid-liquid transition in the Pb-Sn alloys

The internal friction of the Pb-Sn alloys was measured during heating proce ss from room temperature to high temperature. It is reported that there is a sudden drop in the internal friction curves of the vibration systems with the presence of solid-liquid transition of the Pb-Sn alloys. The decrement of the internal friction varies with the content of tin. It is proposed th at these variations are related with the structure variation of the Pb-Sn a lloys during solid - liquid transition.