Relationship between columnar crystal spacing and electric current density in unidirectional solidification of monophase Cu-Al alloy

来源期刊：中国有色金属学报(英文版)2002年第5期

论文作者：常国威 曹丽云 袁军平 王自东 吴春京 胡汉起

文章页码：956 - 959

Key words：unidirectional solidification; columnar crystal spacing; effect of electric current; Cu-Al alloy

Abstract: On the basis of previous theoretical inferential relationship between the columnar crystal spacing and the density of electric current applied during unidirectional solidification, the effect of current density on the columnar crystal spacing was discussed and analyzed, and the experiment was made to verify the theoretical relationship. The results show that at fast solidification speed the columnar crystal spacing decreases with increasing the density of electric current, while at slow solidification speed the columnar crystal spacing increases with increasing the density of electric current. The critical conditions for the evolution of columnar crystal spacing were confirmed. The calculated values concerning the spacing and the density are consistent with the experimental results.