中国有色金属学会会刊(英文版)
中國有色金屬學會會刊(英文版)
중국유색금속학회회간(영문판)
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2002年
5期
956-959
,共4页
常国威%曹丽云%袁军平%王自东%吴春京%胡汉起
常國威%曹麗雲%袁軍平%王自東%吳春京%鬍漢起
상국위%조려운%원군평%왕자동%오춘경%호한기
unidirectional solidification%columnar crystal spacing%effect of electric current%Cu-Al alloy
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.
