STRUCTURE OF AL-CU ALLOY INGOTS SOLIDIFIED UNIDIRECTIONALLY FROM THE BOTTOM

被引:3
|
作者
SATO, T [1 ]
SATO, Y [1 ]
机构
[1] TOHOKU UNIV,GRAD SCH,SENDAI,MIYAGI 980,JAPAN
来源
TRANSACTIONS OF THE JAPAN INSTITUTE OF METALS | 1982年 / 23卷 / 07期
关键词
541 Aluminum and Alloys - 544 Copper and Alloys;
D O I
10.2320/matertrans1960.23.388
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
INGOTS WERE MADE FROM PURE OR COMMERCIALLY PURE ALUMINUM (99. 99 MASPAL AND 99. 8 MASSPAL) SOLIDIFICATION PROCEEDED NOTONLY WITH GROWTH OF COLUMNAR CRYSTALS BUT ALSO WITH PRODUCTION OF FREE CRYSTALS WHICH BECAME COLUMNAR FREE CRYSTALS OR ENCLOSED FREE CRYSTALS. THE COLUMNAR TO EQUIAXED TRANSITION HAD A TRANSITIONAL ZONE WHICH BEGAN WITH THE PRODUCTION OF FREE CRYSTALS AND FINISHED WITH A SUFFICIENT SUPPLY TO STOP COMPETITIVE GROWTH BETWEEN FREE CRYSTALS AND COLUMNAR CRYSTALS FROM BELOW. THE MOST PROBABLE MECHANISM HETEROGENEOUS NUCLEATION IN CONSTITUTIONALLY SUPERCOOLED LIQUID.
引用
收藏
页码:388 / 397
页数:10
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