Spherical constituent particles formed by a multistage solution treatment in Al-Zn-Mg-Cu alloys

被引：33

作者：

Yang, X. B. ^{[1
]}

Chen, J. H. ^{[1
]}

Liu, J. Z. ^{[1
]}

Liu, P. ^{[1
]}

Qin, F. ^{[1
]}

Cheng, Y. L. ^{[1
]}

Wu, C. L. ^{[1
]}

机构：

[1] Hunan Univ, Coll Mat Sci & Engn, Ctr High Resolut Electron Microscopy, Changsha 410082, Hunan, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2013年 / 83卷

基金：

中国国家自然科学基金;

关键词：

Aluminum alloy; Solution treatment; Quasicrystal; Second phase; Electron microscopy; ALUMINUM-ALLOYS; AS-CAST; CORROSION; MICROSTRUCTURE;

D O I：

10.1016/j.matchar.2013.06.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The corrosion resistance and fracture toughness of Al-Zn-Mg-Cu alloys are greatly affected by the remaining large constituent particles with sharp corners and sharp edges. Here, we show that with a careful high-temperature solution treatment, these constituent particles can be formed into spherical rather than irregular shapes. This results in better corrosion resistance and mechanical properties for the alloys than the conventional solution treatment. The complex microstructures of the formed spherical constituent particles and their formation mechanism were studied using focused ion beam (FIB), scanning transmission electron microscopy (STEM) and selected area electron diffraction (SAED). It was revealed that there are five types of spherical constituent particles formed after the special solution treatment, and each type has its own characteristic microstructural features. (C) 2013 The Authors. Published by Elsevier Inc. All rights reserved.

引用

页码：79 / 88

页数：10

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