Acta Metallurgica Sinica (English Letters) ›› 1990, Vol. 3 ›› Issue (4): 243-248.

• Research paper • Previous Articles     Next Articles

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

JI Jingwen WEI Quanjin GENG Dianqi WU Yuqin Northeast University of Technology,Shenyang,China Professor,Dept.of Physics,Northeast University of Technology,Shenyang 110006,China   

  • Received:1990-08-25 Revised:1990-08-25 Online:1990-08-25 Published:2009-10-10

Abstract: The grain boundary internal friction(GBIF)in Fe-P and Fe-P-La alloys containing trace Cu has been studied.It is found that an addition of 0.584—0.722 wt-% La obviously reduces the IF,shifts grain boundary peaks towards higher temperatures,and produces a small addi- tional peak at even higher temperature.The mechanism of GBIF is explained as the movement of defects of atomic size,namely point defects,at gram boundaries and/or their clusters un- der stress.

Key words: internal friction, grain boundary, Fe-P alloy, La, Cu