Coarsening rate of microstructure in semi-solid aluminium alloys

被引：22

作者：

Atkinson, H. V. ^{[1
]}

Liu, D. ^{[1
]}

机构：

[1] Univ Leicester, Mech Mat Res Grp, Dept Engn, Leicester LE1 7RH, Leics, England

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2010年 / 20卷 / 09期

基金：

英国工程与自然科学研究理事会;

关键词：

coarsening; semi-solid metal; 2014; alloy; recrystallisation and partial melting; cooling slope; MECHANICAL-PROPERTIES; EVOLUTION; RHEOLOGY; BEHAVIOR; A356;

D O I：

10.1016/S1003-6326(09)60356-3

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The rate of microstructural coarsening of recrystallisation and partial melting ( RAP) and cooling slope ( CS) processed materials in the semi-solid state is compared with rates found in the literature. The rate of coarsening depended on the liquid fraction but RAP route 2014 alloy with 37% liquid coarsened slightly more slowly than the CS route 2014 alloy with a lower liquid fraction of 17%, contrary to expectations. For the CS route, an increase in liquid fraction resulted in faster coarsening. A modified 2014 alloy with Fe, Mn and Zn stripped out of the composition gave a relatively high coarsening rate. The coarsening rate was also relatively high for CS 201 alloy in comparison with either RAP 2014 or CS 2014. Low coarsening rates are thought to be associated with the presence of particles which inhibit the migration of liquid film grain boundaries. This could be the result of pinning or of the liquid film impeding diffusion at the boundary.

引用

页码：1672 / 1676

页数：5

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