Effect of Element on Porosity and Residual Stress Distribution of A7N01S-T5 Aluminum Alloy Welded Joints in High-Speed Trains

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Effect of Element on Porosity and Residual Stress Distribution of A7N01S-T5 Aluminum Alloy Welded Joints in High-Speed Trains

Y. Liu, J. Chen, G. Guo, J. An, H. Chen

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Abstract. In this paper, four types of A7N01S-T5 aluminum alloys with different chemical elements were investigated. Welded joints of the alloys were fabricated under 70%environmental humidity conditions at 10°C with single pulse GMAW welding technology. The alloys and their joints were tested and examined with impact toughness, porosities distribution and Synchrotron Radiation. The element results showed that the elements of Zn and Mg were the main factors that affect impact properties of the alloys. The #2 alloy which has the element of Zn-4.29 Mg-1.56 Mn-0.22 Cr-0.14 Zr-0.01 Ti-0.027 had the best impact properties which were 20.76J.The results indicated that the #2 had the lest stomatas only 22 and had the lowest porosity rate of 0.009% . Weld zone compared with the base material, the content of Mn and Ti had reduced.the#2 residual stress evenly distributed,the maximum tensile stress was 99Mpa in weld and the maximum compressive stress -66Mpa in base metal.forming .

Keywords
A7N01S-T5 Aluminum Alloys, Chemical Element, Porosity Distribution, High Speed Trains

Published online 12/22/2016, 6 pages
Copyright © 2016 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Y. Liu, J. Chen, G. Guo, J. An, H. Chen, ‘Effect of Element on Porosity and Residual Stress Distribution of A7N01S-T5 Aluminum Alloy Welded Joints in High-Speed Trains’, Materials Research Proceedings, Vol. 2, pp 503-508, 2017

DOI: http://dx.doi.org/10.21741/9781945291173-85

The article was published as article 85 of the book Residual Stresses 2016

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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