您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 9    No. 3    September 1999

[PDF Download]    [Flash Online]

    

Primary cellular/dendritic spacing selection of Al-4.95 Zn alloy under near-rapid directional solidification condition
Feng Jian(冯 坚), Li Tao(李 涛), Lin Xin(林 鑫),Huang Weidong(黄卫东), Zhou Yaohe(周尧和)

State Key Laboratory of Solidification Processing,Northwestern Polytechnical University, Xi′an 710072, P.R.China

Abstract:Al-4.95%Zn alloy is directionally solidified in a modified Bridgman apparatus with higher temperature gradient to investigate response of cellular/dendritic microstructures and primary spacing to the variation of growth velocity under near-rapid directional solidification condition. The results show that, with increasing growth rate, there exists a transition from dendrite to fine cell and a wide distribution range in primary cellular/dendritic spacing at the given temperature gradient. The maximum, λmax, minimum ,λmin, and average primary spacing, -λ, as functions of growth velocity,v, can be given by λmax=12 340v-0.8353, λmin=2 953.7v-0.7717,λ=7 820.3v-0.8333, respectively.

 

Key words: Al-4.95%Zn alloy; near-rapid directional solidification; cellular/dendritic microstructures; primary spacing

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn