Atomic structure and growth mechanism of T1 precipitate in Al-Cu-Li-Mg-Ag alloy

被引：74
|
作者：
Kang, Sung Jin [1 ,2 ,3 ,4 ]
Kim, Tae-Hoon [5 ]
Yang, Cheol-Woong [5 ]
Lee, Je In [1 ,2 ]
Park, Eun Soo [1 ,2 ]
Noh, Tae Won [3 ,4 ]
Kim, Miyoung [1 ,2 ]
机构：
[1] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea
[2] Seoul Natl Univ, Res Inst Adv Mat, Seoul 151744, South Korea
[3] Inst for Basic Sci Korea, Ctr Correlated Elect Syst, Seoul 151742, South Korea
[4] Seoul Natl Univ, Dept Phys & Astron, Seoul 151742, South Korea
[5] Sungkyunkwan Univ, Sch Adv Mat Sci & Engn, Gyeonggi Do 440746, South Korea
来源：
SCRIPTA MATERIALIA | 2015年 / 109卷
基金：
新加坡国家研究基金会;
关键词：
T-1; phase; Z-contrast microscopy; Energy dispersive X-ray spectroscopy (EDXS); Scanning/transmission electron microscopy (STEM); Aluminum alloys; OMEGA PHASE; HAADF-STEM; EVOLUTION; PROBE;
D O I：
10.1016/j.scriptamat.2015.07.020
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The atomic structure of a 0.94-nm-thick T-1 precipitate in an Al-Cu-Li-Mg-Ag alloy is investigated by combining aberration-corrected scanning transmission electron microscopy (STEM) and energy-dispersive X-ray spectroscopy (EDX). Ag segregates at the first layer of the T-1 precipitate interface, revealing a significant compositional variation of Ag throughout the interface. Moreover, the T-1 precipitate thickened from 0.94 nm with successive stacking of identical 0.94 nm thick layers. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：68 / 71
页数：4
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