On the increase of the precipitated volume fraction during Ostwald ripening, exemplified for aluminium-lithium alloys

被引：11

作者：

Kalogeridis, A

Pesicka, J

Nembach, E

机构：

[1] Univ Munster, Inst Met Forsch, D-48149 Munster, Germany

[2] Charles Univ, Dept Phys, Prague 12116 2, Czech Republic

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1999年 / 268卷 / 1-2期

关键词：

aluminium-lithium alloys; Ostwald ripening; particle growth; precipitation processes; transmission electron microscopy; delta '-particles;

D O I：

10.1016/S0921-5093(99)00083-0

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

During Ostwald ripening of precipitates, their average radius r and their volume fraction f may increase concurrently with aging time t. In contrast to the majority of investigations in this field, the emphasis of the present study is on the function f(r) and not on r(t). Experimental data f(r) of seven aluminium-rich aluminium-lithium alloys are analyzed in the light of a relation recently published by Ardell (Mater. Sci. Eng. A238 (1997) 108). In agreement with this relation, fis found to be a linear function of 1/r. The slope partial derivative f/partial derivative(1/r) varies strongly with the overall lithium-concentration of the alloys. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：197 / 201

页数：5