On the mechanism of grain refinement in Al-Zr-Ti alloys

被引：76

作者：

Atamanenko, T. V. ^{[1
]}

Eskin, D. G. ^{[2
]}

Sluiter, M. ^{[1
]}

Katgerman, L. ^{[1
]}

机构：

[1] Delft Univ Technol, Dept Mat Sci & Engn, NL-2628 CD Delft, Netherlands

[2] Mat Innovat Inst, NL-2628 CD Delft, Netherlands

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 01期

关键词：

Aluminum alloys; Intermetallics; Nucleation; Grain refinement; Cavitation; Ultrasound; ALUMINUM-ALLOYS; INOCULATION; MELTS;

D O I：

10.1016/j.jallcom.2010.09.046

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In high-strength aluminum alloys Ti and Zr are commonly present as alloying elements, mostly as anti-recrystallization agents. Grain refinement during solidification is also achieved using Ti but in the form of titanium borides. Our previous investigations showed that a combined addition of Zr and Ti enables considerable grain refinement in aluminum alloys upon cavitation treatment, much stronger than that of Zr alone. The role of titanium and ultrasonic processing remained unclear. In this paper we propose a mechanism of the grain refinement that includes structural changes in solidification sites, their refinement and initiation of heterogeneous nucleation at lower undercooling. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：57 / 60

页数：4

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