Nano-scale precipitates: The key to high strength and high conductivity in Al alloy wire

被引：84
|
作者：
Hou, J. P. [1 ,2 ]
Wang, Q. [1 ]
Zhang, Z. J. [1 ]
Tian, Y. Z. [1 ]
Wu, X. M. [3 ]
Yang, H. J. [1 ]
Li, X. W. [2 ]
Zhang, Z. F. [1 ]
机构：
[1] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
[2] Northeastern Univ, Sch Mat Sci & Engn, Dept Mat Phys & Chem, Shenyang 110819, Liaoning, Peoples R China
[3] Liaoning Elect Power Co Ltd, Liaoning Elect Power Co, Elect Power Res Inst, Shenyang 110006, Liaoning, Peoples R China
来源：
MATERIALS & DESIGN | 2017年 / 132卷
基金：
中国国家自然科学基金;
关键词：
Aluminum alloys; Precipitation; Electrical conductivity; Strength; MG-SI ALLOYS; ALUMINUM-ALLOY; ELECTRICAL-CONDUCTIVITY; CRYSTAL-STRUCTURE; CU; BEHAVIOR; DESIGN; PHASE; MICROSTRUCTURE; TEMPERATURE;
D O I：
10.1016/j.matdes.2017.06.062
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Outstanding mechanical and conductive properties are vital to Al alloys used as overhead conductors. However, high strength and high electrical conductivity are usually mutually exclusive in metallic materials. In this study, we present a novel method to achieve high strength and high conductivity in an Al-Mg-Si conductor. Numerous dispersive nano-scale precipitates were obtained using an artificial aging treatment for a 6201RE Al alloy conductor. The precipitation of the alloying elements in the form of nano-scale precipitates is determined to play a strengthening role, decreasing the concentration of alloying elements in the matrix and reduce lattice distortion such that high strength (352.3MPa) and high electrical conductivity (56.0% IACS) are achieved simultaneously in a 6201RE Al alloy. High strength and enhanced electrical conductivity could be achieved by introducing the nanoscale precipitates in the Al alloy. Finally, the strengthening mechanisms and the electrical conductivity induced by the nano-scale precipitates were discussed. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：148 / 157
页数：10
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