Measurement of grain bridging in some Al-Cu and Al-Sn alloys

被引：14
|
作者：
Ju, YX [1 ]
Arnberg, L [1 ]
机构：
[1] Norwegian Univ Sci & Technol, Inst Mat Technol, N-7491 Trondheim, Norway
来源：
INTERNATIONAL JOURNAL OF CAST METALS RESEARCH | 2003年 / 16卷 / 06期
关键词：
grain bridging; quenching; hot tearing; aluminium alloys; measurement;
D O I：
10.1080/13640461.2003.11819630
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
A quantitative investigation of interdendritic bridging in some Al-Cu and Al-Sn alloys is presented. The experimental measurement methods and bridging fractions at different eutectic liquid fractions are given. The different bridging fractions in Al-Cu and Al-Sn of different compositions- have been found, and the effect of grain refinement on the bridging between the grains is analysed. The measurement is based on metallographic investigation of samples that have been quenched just above the eutectic temperature. Electron microprobe analyses across the bridges have been done and the diffusion of Cu in Al has been calculated in order to rule out alternative interpretations of experimental investigations. Finally, the possibilities of incorporating the experimental results into hot tearing models are discussed. (C) 2003 W. S. Maney Son Ltd.
引用
收藏
页码：522 / 530
页数：9
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