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Effects of Post-Weld Heat Treatment on Microstructure and Mechanical Properties of Al-12.7Si-0.7Mg Alloy Welded Joints by GMAW

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

In this study, 3-mm-thick hot-extruded plates of Al-12.7Si-0.7Mg alloy were used to fabricate the joints welded by gas metal arc welding. Effects of the post-weld heat treatment include solid solution treatment, water quenching, and artificial aging treatment on the microstructure, and mechanical properties of the weld joints have been investigated. Results showed that the welded joints after solid solution and artificial aging exhibited the increases in yield strength of 166 MPa and ultimate tensile strength of 148 MPa, respectively. Based on the microstructural observations, the associated mechanisms were discussed.

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Acknowledgments

This work was financially supported by the Project of National Science & Technology Pillar Program (Nos. 2009BAG12A07-B02 and 2009BAE80B01) and National Natural Science Foundation of China (No. 51071040). The authors gratefully acknowledge Dr. Wang Xinli, from Northeastern Univ., for assistance with guidance for this paper writing.

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Authors and Affiliations

  1. Key Laboratory of Anisotropy and Texture of Materials of Ministry of Education, Northeastern University, Shenyang, 110819, China

    Dong Wang, Changshu He, Hao Wang, Xiang Zhao & Liang Zuo

Authors
  1. Dong Wang
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  2. Changshu He
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  3. Hao Wang
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  4. Xiang Zhao
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  5. Liang Zuo
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Correspondence to Changshu He.

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Wang, D., He, C., Wang, H. et al. Effects of Post-Weld Heat Treatment on Microstructure and Mechanical Properties of Al-12.7Si-0.7Mg Alloy Welded Joints by GMAW. Acta Metall. Sin. (Engl. Lett.) 27, 245–252 (2014). https://doi.org/10.1007/s40195-014-0052-4

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  • DOI: https://doi.org/10.1007/s40195-014-0052-4

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