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

页码：68 / 71

页数：4

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