Revisiting the precipitation sequence in Al-Zn-Mg-based alloys by high-resolution transmission electron microscopy

被引：136

作者：

Liu, J. Z. ^{[1
,2
]}

Chen, J. H. ^{[1
]}

Yang, X. B. ^{[1
]}

Ren, S. ^{[1
]}

Wu, C. L. ^{[1
]}

Xu, H. Y. ^{[2
]}

Zou, J. ^{[2
]}

机构：

[1] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China

[2] Univ Queensland, Ctr Microscopy & Microanal, Brisbane, Qld 4072, Australia

来源：

SCRIPTA MATERIALIA | 2010年 / 63卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Aluminum alloys; Ageing; Precipitation; High-resolution electron microscopy; MICROSTRUCTURAL EVOLUTION; DECOMPOSITION PROCESSES; PHASE; NUCLEATION; SYSTEM;

D O I：

10.1016/j.scriptamat.2010.08.001

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The precipitation process in Al-Zn-Mg-based alloys has been revisited using high-resolution transmission electron microscopy. It was found that there is an intermediate phase between the eta' phase and the eta phase. This intermediate phase with a hexagonal structure can be termed the eta precursor, since its a lattice parameter is the same as that of the eta' phase and its c lattice parameter is approximately the same as that of the eta phase. Transformation from the eta' phase to the eta phase occurs smoothly with this eta precursor existing between them. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1061 / 1064

页数：4

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