Strip casting of Al-Pb alloys - a numerical analysis

被引：66
|
作者：
Zhao, JZ [1 ]
Drees, S [1 ]
Ratke, L [1 ]
机构：
[1] German Aerosp Ctr, Inst Space Simulat, D-51140 Cologne, Germany
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2000年 / 282卷 / 1-2期
关键词：
immiscible; Al-Pb alloy; strip casting; microstructure evolution; numerical modelling;
D O I：
10.1016/S0921-5093(99)00755-8
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A numerical model describing the microstructural evolution of strip cast immiscible alloys is presented. The numerical results for AI-Pb-type bearing alloys show that in strip casting a constitutional supercooling region exists in front of the solid/liquid interface where liquid/liquid decomposition takes place. A higher solidification velocity leads to a higher nucleation rate and. therefore, to a higher number density of the minority phase droplets. As a result, the average radius of droplets in the melt at the solid/liquid interface decreases with the solidification velocity. The numerical model is compared with experimental results. (C) 2000 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：262 / 269
页数：8
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