Refining grain structure and porosity of an aluminium alloy with intensive melt shearing

被引：51

作者：

Zuo, Y. ^{[1
]}

Li, H. ^{[1
]}

Xia, M. ^{[1
]}

Jiang, B. ^{[1
]}

Scamans, G. M. ^{[1
]}

Fan, Z. ^{[1
]}

机构：

[1] Brunel Univ, LiME, EPSRC Ctr Innovat Mfg Liquid Met Engn, BCAST, Uxbridge UB8 3PH, Middx, England

来源：

SCRIPTA MATERIALIA | 2011年 / 64卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

Aluminium alloys; Intensive melt shearing; Grain refining; Porosity; ENHANCED HETEROGENEOUS NUCLEATION; FREQUENCY ELECTROMAGNETIC-FIELD; REFINEMENT; MICROSTRUCTURES; SOLIDIFICATION;

D O I：

10.1016/j.scriptamat.2010.09.046

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Intensive melt shearing was achieved using a twin-screw machine to condition an aluminium alloy prior to solidification. The results show that intensive melt shearing has a significant grain-refining effect. In addition, the intensive melt shearing reduces both the volume fraction and the size of porosity. It can reduce the density index from 10.50% to 2.87% and the average size of porosity in the samples solidified under partial vacuum from around 1 mm to 100 mu m. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：209 / 212

页数：4

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