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Improved solution treatment for an as-rolled Al-Zn-Mg-Cu alloy. Part I. Characterisation of constituent particles and overheating
D. K. Xu; P. A. Rometsch; N. Birbilis
2012
Source PublicationMaterials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN0921-5093
Volume534Pages:234-243
AbstractThe main coarse constituents in as-rolled aluminium alloy AA7150 were determined by electron backscattered diffraction (EBSD) phase identification to be MgZn2 (eta), Al2CuMg (S), Mg2Si and Al7Cu2Fe. Based on differential scanning calorimetry (DSC) analysis and microstructural observations of single-step solution treated samples, the melting onset temperatures of (alpha + eta) and (alpha + eta + S) are 478(-2)(+1)degrees C and 478(-2)(+1)degrees C, respectively. However, Mg2Si and Al7Cu2Fe particles are very stable and insoluble during typical solution treatments. When the re-melting of (alpha + eta) or (alpha + eta + S) occurs, holes will be left at the original sites of these particles. Since the size of the S-phase particles is larger than that of the eta particles, the holes caused by the re-melting of (alpha + eta + S) are relatively larger. When samples were rapidly heated up to 515 degrees C and solution treated at this temperature, network eutectics composed of MgZn2, Al2CuMg, Mg2Si and alpha-Al were formed at the grain boundaries. 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
KeywordOverheating Constituent Particle Solution Temperature Aluminium Alloy Electron Backscatter Diffraction Aluminum-alloy Fracture-behavior Microstructural Evolution Homogenization Treatment Strength Heat Precipitation Deformation Temperature
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/60362
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 I. Characterisation of constituent particles and overheating[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2012,534:234-243.
APA D. K. Xu,P. A. Rometsch,&N. Birbilis.(2012).Improved solution treatment for an as-rolled Al-Zn-Mg-Cu alloy. Part I. Characterisation of constituent particles and overheating.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,534,234-243.
MLA D. K. Xu,et al."Improved solution treatment for an as-rolled Al-Zn-Mg-Cu alloy. Part I. Characterisation of constituent particles and overheating".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 534(2012):234-243.
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