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Metals 2016, 6(3), 52; doi:10.3390/met6030052

Influence of Post Weld Heat Treatment on Strength of Three Aluminum Alloys Used in Light Poles

1
Civil Engineering and Associate Dean, College of Engineering, The University of Akron, Akron, OH 44325, USA
2
Department of Civil Engineering, the University of Akron, Akron, OH 44325, USA
3
Research and Development, HAPCO, Abingdon, VA 24210, USA
4
HAPCO, Abingdon, VA 24210, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Nong Gao
Received: 8 December 2015 / Revised: 12 February 2016 / Accepted: 22 February 2016 / Published: 3 March 2016
(This article belongs to the Special Issue Aluminum Alloys)
View Full-Text   |   Download PDF [21616 KB, uploaded 3 March 2016]   |  

Abstract

The conjoint influence of welding and artificial aging on mechanical properties were investigated for extrusions of aluminum alloy 6063, 6061, and 6005A. Uniaxial tensile tests were conducted on the aluminum alloys 6063-T4, 6061-T4, and 6005A-T1 in both the as-received (AR) and as-welded (AW) conditions. Tensile tests were also conducted on the AR and AW alloys, subsequent to artificial aging. The welding process used was gas metal arc (GMAW) with spray transfer using 120–220 A of current at 22 V. The artificial aging used was a precipitation heat treatment for 6 h at 182 °C (360 °F). Tensile tests revealed the welded aluminum alloys to have lower strength, both for yield and ultimate tensile strength, when compared to the as-received un-welded counterpart. The beneficial influence of post weld heat treatment (PWHT) on strength and ductility is presented and discussed in terms of current design provisions for welded aluminum light pole structures. View Full-Text
Keywords: light poles; aluminum alloy; welding; gas metal arc welding; artificial aging; post weld heat treatment; microstructure; tensile properties light poles; aluminum alloy; welding; gas metal arc welding; artificial aging; post weld heat treatment; microstructure; tensile properties
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

Menzemer, C.C.; Hilty, E.; Morrison, S.; Minor, R.; Srivatsan, T.S. Influence of Post Weld Heat Treatment on Strength of Three Aluminum Alloys Used in Light Poles. Metals 2016, 6, 52.

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