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Acta Metall Sin  1990, Vol. 26 Issue (1): 14-19    DOI:
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INTERNAL FRICTION OF GRAIN BOUNDARIES IN Fe-P AND Fe-P-La ALLOYS CONTAINING TRACE COPPER
JI Jingwen;WEI Quanjin;GENG Dianqi;WU Yuqin Northeast University of Technology; Shenyang professor;Department of Physics;Northeast University of Technology; Shenyang 110006
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JI Jingwen;WEI Quanjin;GENG Dianqi;WU Yuqin Northeast University of Technology; Shenyang professor;Department of Physics;Northeast University of Technology; Shenyang 110006. INTERNAL FRICTION OF GRAIN BOUNDARIES IN Fe-P AND Fe-P-La ALLOYS CONTAINING TRACE COPPER. Acta Metall Sin, 1990, 26(1): 14-19.

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Abstract  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.
Key words:  Fe-P-La alloy      internal friction peak      grain boundary peak      Ia     
Received:  18 January 1990     
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