A model of growth morphology for semi-solid metals

被引：64

作者：

Wu, SS ^{[1
]}

Wu, XP ^{[1
]}

Xiao, ZH ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Coll Mat Sci & Engn, State Key Lab Mould & Dies Technol, Wuhan 430074, Peoples R China

来源：

ACTA MATERIALIA | 2004年 / 52卷 / 12期

关键词：

semi-solid metal; solidification; microstructure; simulation;

D O I：

10.1016/j.actamat.2004.04.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

For the preparation of semi-solid slurry, the composition concentration field and temperature field of solidifying crystals were analysed under stirring condition. A shape determination model for grain growth was developed by using solidification velocity and flow speed of the liquid as variations of affecting the shape of crystals. The relationship of grain shape fraction f(i) with solidification velocity R and convection speed v was expressed as: f(i) = e(-28)/(e). The growth morphology of semi-solid metals was simulated with this model. Simulated results show that with the increase of convection speed or the decrease of solidification velocity, the grains changes from dendrite to spherical shape, and vice versa. The simulation results were in agreement with the experimental results. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：3519 / 3524

页数：6

共 16 条

[1] MICROSTRUCTURE OF STIR-CAST METALS [J].