Cu-Al-Be阻尼合金的抗空泡剥蚀性能

Cavitation erosion of Cu-Al-Be damping alloys

采用超声伸缩振动空蚀设备及XRD和SEM等手段 ,研究了Cu Al Be阻尼合金与对比合金ZHMn5 5 3 1和ZQAl12 8 3 2的空泡剥蚀性能。结果表明 ,Cu Al Be合金的空泡剥蚀平均速率仅为 0 .0 4mm3 /h ,相当于ZHMn5 5 3 1的 3.6 % ,ZQAl 12 8 3 2的 5 0 % ,具有优异的抗空泡剥蚀性。外力作用下Cu Al Be合金马氏体变体间的界面迁移 ,有助于减轻材料表面的塑性变形和疲劳积累 ,提高抗空蚀性能。

An investigation of the cavitation erosion character of Cu-Al-Be damping alloys compared with other two kinds of alloys, i.e. ZHMn55-3-1 and ZQAl12-8-3-2, by means of an ultrasonic vibration apparatus and XRD and SEM were reported. The results prove that Cu-Al-Be alloys possess excellent cavitation erosion resistance with a small cavitation volume loss rate of 0.04 mm 3/h, which is just about 3.6% of ZHMn55-3-1's and 50% of ZQAl-12-8-3-2's. The motion of borders between martensite variants is of help to relieve the cavitation erosion. Being soft, α phase is the main factor for the cavitation erosion of the Cu-Al-Be alloys, which ocurs along polycrystalline borders.