Role of zirconium and impurities in grain refinement of aluminium with Al-Ti-B

被引：1
|
作者：
Rao, AA
Murty, BS
Chakraborty, M
机构：
[1] Dept. of Metall. and Mat. Eng., Indian Institute of Technology, Kharagpur
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 1997年 / 13卷 / 09期
关键词：
D O I：
10.1179/mst.1997.13.9.769
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The present work reports grain refinement studies on Al-0.2%Zr and Al-2%Zr alloys using an Al-5Ti-1B master alloy as the grain refiner. The influence of impurities (Fe and Si) present in Al on the poisoning tendency (adverse effect) of Zr on grain refinement has also been studied. Zirconium was found to be a potential grain refiner of Al at high concentrations (2%). However; Zr has shown poisoning effects on the good grain refining capability of Al-5Ti-1B. This poisoning effect was milder at higher concentrations of Zr and in the presence of impurities in Al. The influence of Zr and impurities on the grain refining efficiency of Al-5Ti-1B is discussed in the light of macroscopic examination, grain size analysis, SEM and energy dispersive X-ray microanalysis, electron probe microanalysis, and TEM studies on Al-Zr alloys.
引用
收藏
页码：769 / 777
页数：9
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