Coherent strengthening of aging precipitation in rapidly solidified Cu-Cr alloy

来源期刊：中国有色金属学报(英文版)1999年第4期

论文作者：刘平 康布熙 曹兴国 黄金亮 顾海澄

文章页码：723 - 727

Key words：rapid solidification; Cu-Cr alloys; aging precipitation; coherent strengthening

Abstract: A single-roller melt spinning method was used to preduce Cu-Cr microcrystalline alloy ribbons.Through proper aging treatment, the strength and hardness of the alloy were remarkably enhanced while the conductivity only had a minimal decrease. Grain refinement and coherent dispersion strengthening were proved to be the major factors contributing to the improvement of strength and hardness of the alloy after aging. The degree of coherent strengthening was almost identical with that calculated by Gerod equatbo. Compared with the solid solution quenched Cu-Cr alloy, the peak hardness was increased 2. 6 times, in which about 27% was attributed to the grain refinement and 73 %, in turn, provided by coherent strengthening due to aging precipitation. Neither the soid solution strengthening nor vacancy strengthening had detectable effect on the strength and hardness of the rapidly solidified Cu-Cr alloy.