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Metals 2015, 5(2), 648-655; doi:10.3390/met5020648

Effects of Different Heat Treatment on Microstructure, Mechanical and Conductive Properties of Continuous Rheo-Extruded Al-0.9Si-0.6Mg (wt%) Alloy

1
School of Metal and Metallurgy, Northeastern University, Wenhua Rd. No.3, Shenyang 110003, China
2
Postgraduate Academy, Shenyang Ligong University, Nanpingzhong Rd. No.6, Shenyang 110000, China
3
CNPC Institute, Taiyanggongnan St. NO.23, Beijing 100010, China
*
Author to whom correspondence should be addressed.
Academic Editor: Anders E. W. Jarfors
Received: 11 February 2015 / Revised: 20 March 2015 / Accepted: 31 March 2015 / Published: 21 April 2015
(This article belongs to the Special Issue Casting Alloy Design and Modification)
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Abstract

Al-0.9Si-0.6Mg (wt%) alloy conductive wires were designed and produced by continuous rheo-extrusion process. The effects of different heat treatment on microstructure, mechanical and conductive properties of the wires were studied. Results show that, after T6 heat treatment, conductive property of the alloy increased while elongation decreased with the higher aging temperature and longer aging time. After T8 and T9 heat treatment, acicular strengthening phase β''-Mg2Si homogeneously precipitated, which effectively improved mechanical and conductive property of the alloy. The tensile strength, elongation and resistivity of T8 heat treated alloy reached 336 MPa, 13.7% and 29.3 nΩm respectively. After T9 heat treatment, the alloy’s tensile strength, elongation and resistivity was 338 MPa, 6.0% and 30.2 nΩ·m respectively. View Full-Text
Keywords: Al-0.9Si-0.6Mg (wt%) alloy; continuous rheo-extrusion; heat treatment; microstructure; mechanical properties Al-0.9Si-0.6Mg (wt%) alloy; continuous rheo-extrusion; heat treatment; microstructure; mechanical properties
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Tie, D.; Guan, R.-G.; Guo, N.; Zhao, Z.; Su, N.; Li, J.; Zhang, Y. Effects of Different Heat Treatment on Microstructure, Mechanical and Conductive Properties of Continuous Rheo-Extruded Al-0.9Si-0.6Mg (wt%) Alloy. Metals 2015, 5, 648-655.

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