Evolution of solute clustering in Al-Cu-Mg alloys during secondary ageing

被引：121
作者：
Marceau, R. K. W. [1 ,2 ]
Sha, G. [1 ,2 ]
Lumley, R. N. [3 ]
Ringer, S. P. [1 ,2 ]
机构：
[1] Univ Sydney, Australian Key Ctr Microscopy & Microanal, Sydney, NSW 2006, Australia
[2] Univ Sydney, ARC Ctr Excellence Design Light Met, Sydney, NSW 2006, Australia
[3] CSIRO Light Met Flagship, Clalyton S Mdc, Vic 3169, Australia
来源：
ACTA MATERIALIA | 2010年 / 58卷 / 05期
基金：
澳大利亚研究理事会;
关键词：
Aluminium alloys; Age hardening; Solute clustering; Secondary ageing; Atom probe tomograph; ATOM-PROBE; GPB ZONES; PRECIPITATION; RECONSTRUCTION; DECOMPOSITION; STRENGTH; KINETICS; ORIGIN; PHASES;
D O I：
10.1016/j.actamat.2009.11.021
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The evolution of an atomistic-level nanostructure during the early stages of secondary ageing of a rapid hardening Al-1.1Cu-1.7Mg (at.%) alloy has been characterized by a combination of atom probe tomography (APT) and transmission electron microscopy. Quantitative APT analysis reveals key changes in the evolution of solute clusters during secondary ageing (T614 condition) that correlate with secondary hardness increments. The microstructures that cause peak hardness differ between the T6 and T614 tempers - the former is a result of solute clustering as well as the precipitation of GPB zones and S phase, whereas in the latter, secondary ageing promotes only the formation of solute clusters. Cu-Mg clusters with high Mg:Cu ratio have the most strengthening potency during secondary ageing in T614 heat treatment. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1795 / 1805
页数：11
相关论文
共 66 条
[1]  
[Anonymous], 2006, LIGHT ALLOYS TRADITI
[2]  
Bagaryatsky Yu.A., 1952, DOKL AKAD NAUK+, V87, P559
[3]   A GENERAL PROTOCOL FOR THE RECONSTRUCTION OF 3D ATOM-PROBE DATA [J].
BAS, P ;
BOSTEL, A ;
DECONIHOUT, B ;
BLAVETTE, D .
APPLIED SURFACE SCIENCE, 1995, 87-8 (1-4) :298-304
[4]  
BROOK GB, 1963, 3 FULM RES I
[5]   Secondary ageing in an aluminium alloy 7050 [J].
Buha, J. ;
Lumley, R. N. ;
Crosky, A. G. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 492 (1-2) :1-10
[6]   Precipitation and solute distribution in an interrupted-aged Al-Mg-Si-Cu alloy [J].
Buha, J. ;
Lumley, R. N. ;
Crosky, A. G. .
PHILOSOPHICAL MAGAZINE, 2008, 88 (03) :373-390
[7]   Secondary precipitation in an Al-Mg-Si-Cu alloy [J].
Buha, J. ;
Lumley, R. N. ;
Crosky, A. G. ;
Hono, K. .
ACTA MATERIALIA, 2007, 55 (09) :3015-3024
[8]  
BUHA J, 2005, THESIS U NEW S WALES
[9]  
Buha J., 2004, Mater. Forum, V28, P1028
[10]   A three-dimensional Markov field approach for the analysis of atomic clustering in atom probe data [J].
Ceguerra, Anna V. ;
Moody, Michael P. ;
Stephenson, Leigh T. ;
Marceau, Ross K. W. ;
Ringer, Simon P. .
PHILOSOPHICAL MAGAZINE, 2010, 90 (12) :1657-1683
1234567