Real-time observation of grain nucleation and growth during solidification of aluminium alloys

被引：102

作者：

Iqbal, N

van Dijk, NH

Offerman, SE

Moret, MP

Katgerman, L

Kearley, GJ

机构：

[1] Delft Univ Technol, Fac Sci Appl, NL-2629 JB Delft, Netherlands

[2] Delft Univ Technol, Dept Mat Sci & Engn, NL-2628 AL Delft, Netherlands

[3] European Synchrotron Radiat Facil, F-38043 Grenoble, France

来源：

ACTA MATERIALIA | 2005年 / 53卷 / 10期

关键词：

solidification; grain refinement; X-ray diffraction; aluminium alloys; TiB2;

D O I：

10.1016/j.actamat.2005.02.045

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The crystallisation kinetics of liquid aluminium-titanium alloys with microscopic TiB2 particles added to refine the grain size in the solidified material was studied by X-ray diffraction measurements at a synchrotron source. Real-time observation of the formation and growth of individual grains reveals the central role played by the added TiB2 particles during solidification. Prior to the main transformation, weak reflections of a metastable TiAl3 phase were detected. This observation finally pinpoints the highly debated mechanism responsible for enhanced grain nucleation in Al-Ti-B alloys. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：2875 / 2880

页数：6

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