Ostwald ripening and stability of precipitates during two successive overaging in an Al-Mg-Li alloy

被引：7

作者：

Ye, Lingying ^{[1
]}

Liu, Xiaodong ^{[1
]}

Tang, Jianguo ^{[1
]}

Liu, Shengdan ^{[1
]}

Zhang, Yong ^{[1
]}

机构：

[1] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China

来源：

MATERIALS LETTERS | 2021年 / 291卷

关键词：

Microstructure; Metals and alloys; Precipitation; Aging; GRAIN-SIZE; ALUMINUM; SUPERPLASTICITY;

D O I：

10.1016/j.matlet.2021.129616

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The precipitate coarsening and dissolution behaviors in an Al-Mg-Li alloy during overaging at 300 degrees C and then at 400 degrees C for various time were investigated. It is shown that the S-1-phase tends to have rod-shaped morphology upon overaging at 300 degrees C. However, followed by overaging at 400 degrees C, which is the dissolution temperature for S-1-phase, the rod-shaped S-1-phase precipitates formed previously were not dissolved until their coarsening were finished. The ensuing reduction of the total precipitate-matrix interface energy due to the dissolution of small precipitates and spheroidization of the rod-shaped precipitates was suggested to provide the driving force for coarsening. (C) 2021 Elsevier B.V. All rights reserved.

引用

页数：4

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