Primary cellular/dendritic spacing selection of Al-Zn alloy during unidirectional solidification

被引：24

作者：

Feng, J ^{[1
]}

Huang, WD ^{[1
]}

Lin, X ^{[1
]}

Pan, QY ^{[1
]}

Li, T ^{[1
]}

Zhou, YH ^{[1
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

来源：

JOURNAL OF CRYSTAL GROWTH | 1999年 / 197卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

unidirectional solidification; cellular/dendritic growth; primary spacing; Al-Zn alloy;

D O I：

10.1016/S0022-0248(98)00916-6

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Al-4.95 wt% Zn alloy is directionally solidified with Bridgman apparatus to investigate response of cellular/dendritic microstructures and primary spacing to the variation of growth velocity. The results show that, with increasing growth rate, there exist a transition from dendrite to cell and a wide distribution range in primary cellular/dendritic spacing. The maximum, lambda(max), minimum, lambda(min), and average primary spacing, <(lambda)over bar> , as functions of growth rate, V, can be given by lambda(max) = 4578V(-0.697), lambda(min) = 1315.7V(-0.6543), <(lambda)over bar> = 3084.5V(-0.6982), respectively. The experimental results are compared with the Hunt-Lu model, and a reasonable agreement is found. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：393 / 935

页数：3

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