Pb-Sn合金固-液转变过程的内耗行为

INTERNAL FRICTION BEHAVIOUR OF THE SOLID-LIQUID TRANSITION IN THE Pb-Sn ALLOYS

在连续升温过程中 ,测量了Pb Sn合金的内耗 .实验发现 :在共晶成分范围内 ,伴随着Pb Sn合金的固—液转变 ,内耗值出现突然下降 .内耗值的下降幅度与Pb Sn合金成分有关 .固—液转变过程中的内耗是由材料结构变化或弛豫时间变化引起的 .

The internal friction of the Pb\|Sn alloys was measured during heating process 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 that these variations are related with the structure variation of the Pb\|Sn alloys during solid-liquid transition.