A quantitative model for describing crystal nucleation in pressurized solidification during squeeze casting

被引：39
|
作者：
Han, Zhiqiang [1 ]
Huang, Xiaoran [1 ]
Luo, Alan A. [2 ]
Sachdev, Anil K. [2 ]
Liu, Baicheng [1 ,3 ]
机构：
[1] Tsinghua Univ, Dept Mech Engn, Minist Educ, Key Lab Adv Mat Proc Technol, Beijing 100084, Peoples R China
[2] Gen Motors Global Res & Dev Ctr, Chem Sci & Mat Syst Lab, Warren, MI 48090 USA
[3] Tsinghua Univ, State Key Lab Automot Safety & Energy, Beijing 100084, Peoples R China
来源：
SCRIPTA MATERIALIA | 2012年 / 66卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Squeeze casting; Aluminum alloys; Nucleation of phase transformations; Analytical methods; MICROSTRUCTURE FORMATION; STRUCTURAL MODEL; KINETICS;
D O I：
10.1016/j.scriptamat.2011.10.041
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A model describing the thermal and mechanical effects on heterogeneous nucleation during squeeze casting of metal alloys has been developed based on classical nucleation theory. Squeeze casting experiments were carried out using an aluminum alloy, where the temperature change inside the casting during pressurized solidification was measured and the grain density at the locations where the temperature was measured was determined. By correlating the grain density and local thermal history, a quantitative function of nucleation rate with pressure and temperature was obtained. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：215 / 218
页数：4
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