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Improved solution treatment for an as-rolled Al-Zn-Mg-Cu alloy. Part II. Microstructure and mechanical properties
D. K. Xu; P. A. Rometsch; N. Birbilis
2012
Source PublicationMaterials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN0921-5093
Volume534Pages:244-252
AbstractIn this work, improved solution treatments and their effects on the microstructure and mechanical properties of as-rolled Al-6.222n-2.11Mg-2.39Cu alloy have been investigated. By exploring the dissolution process of soluble constituent particles and monitoring changes in the grain structure, a solution treatment sequence with a good balance between a minimum volume fraction of remaining constituents and a partially recrystallised grain structure has been obtained. The results indicate that MgZn2 (eta) particles can be completely dissolved after holding at 475 degrees C for only 5 min, whereas the dissolution of Al2CuMg (S) particles is relatively difficult and their complete dissolution requires a stepped solution treatment. By conducting a final solution treatment step at an increased temperature of 495 degrees C, all the S-phase particles can be dissolved, whereas the recrystallised fraction can still be controlled to be less than 50%. After retrogression and re-ageing (RRA), samples subjected to a final-stage solution treatment at 495 degrees C have a relatively higher volume fraction of eta' and eta precipitates and can therefore have better mechanical properties. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.
description.department[xu, d. k.; rometsch, p. a.; birbilis, n.] monash univ, dept mat engn, arc ctr excellence design light met, clayton, vic 3800, australia. [xu, d. k.] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;xu, dk (reprint author), monash univ, dept mat engn, arc ctr excellence design light met, clayton, vic 3800, australia.;daokui.xu@hotmail.com
KeywordSolution Treatment Constituent Particle Dissolution Kinetics Recrystallisation Aa7150 Aluminum-alloys Fracture-toughness Heat-treatment Process Model Si-cu Precipitation Behavior Strength Dissolution Cracking
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/60363
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
D. K. Xu,P. A. Rometsch,N. Birbilis. Improved solution treatment for an as-rolled Al-Zn-Mg-Cu alloy. Part II. Microstructure and mechanical properties[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2012,534:244-252.
APA D. K. Xu,P. A. Rometsch,&N. Birbilis.(2012).Improved solution treatment for an as-rolled Al-Zn-Mg-Cu alloy. Part II. Microstructure and mechanical properties.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,534,244-252.
MLA D. K. Xu,et al."Improved solution treatment for an as-rolled Al-Zn-Mg-Cu alloy. Part II. Microstructure and mechanical properties".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 534(2012):244-252.
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