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

被引：78

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

共 18 条

[1] Microstructural evolution during ageing of Al-Cu-Li-x alloys [J].

Araullo-Peters, Vicente ;

Gault, Baptiste ;

de Geuser, Frederic ;

Deschamps, Alexis ;

Cairney, Julie M. .

ACTA MATERIALIA, 2014, 66 :199-208

[2] STRUCTURE-PROPERTY RELATIONSHIPS IN AL-LI-CU-MG-AG-ZR ALLOY X2095 [J].

BLANKENSHIP, CP ;

STARKE, EA .

ACTA METALLURGICA ET MATERIALIA, 1994, 42 (03) :845-855

[3] THE EFFECT OF PLASTIC-DEFORMATION ON AL2CULI (T1) PRECIPITATION [J].

CASSADA, WA ;

SHIFLET, GJ ;

STARKE, EA .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1991, 22 (02) :299-306

[4] Atomic structure of T1 precipitates in Al-Li-Cu alloys revisited with HAADF-STEM imaging and small-angle X-ray scattering [J].

Donnadieu, P. ;

Shao, Y. ;

De Geuser, F. ;

Botton, G. A. ;

Lazar, S. ;

Cheynet, M. ;

de Boissieu, M. ;

Deschamps, A. .

ACTA MATERIALIA, 2011, 59 (02) :462-472

[5] Combined electron beam imaging and ab initio modeling of T1 precipitates in Al-Li-Cu alloys [J].

Dwyer, C. ;

Weyland, M. ;

Chang, L. Y. ;

Muddle, B. C. .

APPLIED PHYSICS LETTERS, 2011, 98 (20)

[6] Atom probe tomography and transmission electron microscopy characterisation of precipitation in an Al-Cu-Li-Mg-Ag alloy [J].

Gault, B. ;

de Geuser, F. ;

Bourgeois, L. ;

Gabble, B. M. ;

Ringer, S. P. ;

Muddle, B. C. .

ULTRAMICROSCOPY, 2011, 111 (06) :683-689

[7]

Hardy H., 1955, J I MET, V84

[8] Coincidence Doppler broadening and 3DAP study of the pre-precipitation stage of an Al-Li-Cu-Mg-Ag alloy 1016/j.actaniat.2003.1 [J].

Honma, T ;

Yanagita, S ;

Hono, K ;

Nagal, Y ;

Hasegawa, A .

ACTA MATERIALIA, 2004, 52 (07) :1997-2003

[9] Independent and combined roles of trace Mg and Ag additions in properties precipitation process and precipitation kinetics of Al-Cu-Li-(Mg)-(Ag)-Zr-Ti alloys [J].

Huang, BP ;

Zheng, ZQ .

ACTA MATERIALIA, 1998, 46 (12) :4381-4393

[10] On the origin of the high coarsening resistance of Ω plates in Al-Cu-Mg-Ag alloys [J].

Hutchinson, CR ;

Fan, X ;

Pennycook, SJ ;

Shiflet, GJ .

ACTA MATERIALIA, 2001, 49 (14) :2827-2841

← 1 2 →