Modeling of structural breakdown during rapid compression of semi-solid alloy slugs

被引：0
|
作者：
Kapranos, P [1 ]
Kirkwood, DH [1 ]
Barkhudarov, MR [1 ]
机构：
[1] Univ Sheffield, Dept Mat Engn, Sheffield, S Yorkshire, England
来源：
5TH INTERNATIONAL CONFERENCE ON SEMI-SOLID PROCESSING OF ALLOYS AND COMPOSITES, PROCEEDINGS | 1998年
关键词：
D O I：
暂无
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Under normal thixoforming conditions, the semi-solid slugs experience a rapid compression before flowing into the die cavity. During a very short time interval, they experience intense shear thinning and their flow behaviour changes from one resembling a solid to that of a viscous liquid. In this paper, a technique of rapid compression testing is outlined, carried out under conditions similar to normal thixoforming. Experimental results are combined with modelling the behaviour of these slurries in FLOW-3D, in order to derive the now parameters. The special properties of semi-solid metals are described using a thixotropic rheological model in which viscosity is a function of shear rate, solid fraction and time.
引用
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页码：11 / 19
页数：9
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