Improved solution treatment for an as-rolled Al-Zn-Mg-Cu alloy. Part I. Characterisation of constituent particles and overheating

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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
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	534 页码:234-243
摘要	The 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.
部门归属	[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
关键词	Overheating Constituent Particle Solution Temperature Aluminium Alloy Electron Backscatter Diffraction Aluminum-alloy Fracture-behavior Microstructural Evolution Homogenization Treatment Strength Heat Precipitation Deformation Temperature
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60362
专题	中国科学院金属研究所
推荐引用方式 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.