Mechanical properties of friction stir welded joints of 5052 aluminum alloy

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  • Hatanaka Nobuo
    Division of Technology and Information Education, Naruto University of Education
  • Nishino Seiichi
    Department of Creative Technology Engineering, Anan National College of Technology
  • Fujii Hidetoshi
    Materials Diagnosis and Life Assessment, Joint and Welding Research Institute, Graduate School of Engineering, Osaka University
  • Morisada Yoshiaki
    Materials Diagnosis and Life Assessment, Joint and Welding Research Institute, Graduate School of Engineering, Osaka University

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Other Title
  • 5052アルミニウム合金の摩擦攪拌接合継手の機械的性質
  • 5052 アルミニウム ゴウキン ノ マサツ カクハン セツゴウ ツギテ ノ キカイテキ セイシツ

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Abstract

The friction stir welding <tt>(</tt>FSW<tt>) </tt>of 5052-O and 5052-H34 aluminum alloys were performed to investigate the mechanical properties of the joints. The mechanical properties of the joints were evaluated by tensile tests and Vickers hardness distribution. The experimental results showed that tensile properties of the joints are significantly affected by the welding process parameters, such as welding speed and rotation speed. It was found that the joint strength of A5052-O joints could be made approximately equal to the strength of the parent metal by using a wide rotational speed and high welding speed. On the other hand, the joint strength of A5052-H34 joints was lower than that of the parent metal. When the welding speed was lower, the joint strength was the same as A5052-O joint. However, when the welding speed was increased, the joint strength was decreased rapidly. Therefore, the effect of friction stir welding on the heat treatment of 5052 aluminum alloys was clarified.

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