The microstructure and precipitation kinetics of a cast aluminium alloy

被引：40
|
作者：
Ovono, DO [1 ]
Guillot, I
Massinon, D
机构：
[1] Univ Technol Compiegne, Lab Roberval, F-60205 Compiegne, France
[2] CNRS, Ctr Etud Chim Met, UPR2801, F-94407 Vitry Sur Seine, France
[3] Fonderie Montupet, F-60181 Nogent Sur Oise, France
来源：
SCRIPTA MATERIALIA | 2006年 / 55卷 / 03期
关键词：
cast aluminum alloys; TEM; aging; coarsening; precipitation kinetics;
D O I：
10.1016/j.scriptamat.2006.03.065
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The microstructure of a cast Al-Si-Cu alloy was studied quantitatively in detail by a combination of differential scanning calorimetry, scanning electron microscopy, scanning tunnelling microscopy and transmission electron microscopy. The kinetics of coarsening can be described by the classical ripening theory. The plot of the rate constant of coarsening and the temperature follows an Arrhenius behaviour with an activation energy of about 140.4 kJ/mol(-1), which is approximately the activation energy for diffusion of Cu and/or Si in Al, indicating diffusion-controlled precipitate growth. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：259 / 262
页数：4
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