含微量Cu的Fe-P及Fe-P-La合金的晶界内耗

INTERNAL FRICTION OF GRAIN BOUNDARIES IN Fe-P AND Fe-P-La ALLOYS CONTAINING TRACE COPPER

本文研究了含微量Cu的Fe-P及Fe-P-La合金系的晶界内耗。发现加进0.584—0.722wt-％的La,明显降低了合金的晶界内耗峰,使晶界峰向高温移动,并在高温处产生一个小内耗峰。对结果做了讨论。进一步阐明了晶界内耗机制:晶界中原子尺寸(即点)缺陷或它们的簇,在应力作用下运动引起内耗。

The grain boundary internal friction in Fe-P and Fe-P-La alloys con-taining a little Cu has been studied. The internal friction is obviously reduced byLa added even 0.584-0.722 wt-%. The grain boundary peak migrates toward thehigh temperature and a small internal friction peak occurs. The grain boundaryinternal friction seems to be interpreted by movement, under stress, of both thedefects of atomic size, namely point defects, in grain boundaries and their clusters.