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

Abstract

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

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. INTERNAL FRICTION OF GRAIN BOUNDARIES IN Fe-P AND Fe-P-La ALLOYS CONTAINING TRACE Cu[J]. Acta Metallurgica Sinica (English Letters), 1990, 3(4): 243-248.

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

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