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Volume 26 Issue 7
Jul.  2019
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Yu-peng Li, Da-qian Sun, Wen-biao Gong, and Liang Liu, Effects of postweld aging on the microstructure and properties of bobbin tool friction stir-welded 6082-T6 aluminum alloy, Int. J. Miner. Metall. Mater., 26(2019), No. 7, pp.849-857. https://dx.doi.org/10.1007/s12613-019-1800-2
Cite this article as: Yu-peng Li, Da-qian Sun, Wen-biao Gong, and Liang Liu, Effects of postweld aging on the microstructure and properties of bobbin tool friction stir-welded 6082-T6 aluminum alloy, Int. J. Miner. Metall. Mater., 26(2019), No. 7, pp.849-857. https://dx.doi.org/10.1007/s12613-019-1800-2
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Research Article

Effects of postweld aging on the microstructure and properties of bobbin tool friction stir-welded 6082-T6 aluminum alloy

Author Affilications

  • Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun 130025, China

  • School of Materials Science and Engineering, Jilin University, Changchun 130025, China

  • Key Laboratory of Advanced Structural Materials, Ministry of Education, Changchun University of Technology, Changchun 130012, China

  • School of Materials Science and Engineering, Changchun University of Technology, Changchun 130012, China

  • Received: 10 September 2018; Revised: 25 December 2018; Accepted: 01 January 2019;
    Graphical Abstract
    • Abstract
  • Samples of 6082-T6 aluminum alloy were subjected to bobbin tool friction stir welding (BT-FSW), and the joints were treated by postweld natural aging (PWNA) and postweld artificial aging (PWAA). The microstructure, microhardness, and tensile properties of the aged and as-welded specimens were investigated. Transmission electron microscopy (TEM) observations revealed that a large number of Guinier-Preston (GP) zones precipitated in the form of a network on the stir zone (SZ) after PWNA for 60 d, and a large number of β" phases precipitated in the matrix for after PWAA for 6 h. As the aging time increased, the microhardness of the SZ and the thermomechanically affected zone (TMAZ) increased significantly, and the hardness of the SZ after PWAA for 6 h was close to that of the base metal (BM). With increasing PWNA time, the strength and strain increased slightly. When the PWAA time increased, the strength clearly increased, with a maximum value of 279.9 MPa after 6 h, while the strain decreased.
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    • References (25)
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