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Effect of Tungsten-Inert-Gas Preheating on Mechanical and Microstructural Properties of Friction Stir Welded Dissimilar Al Alloy and Mild Steel

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Strength of Materials Aims and scope

The purpose of this study is to clarify the effect of tungsten-inert-gas (TIG) welding preheating on the mechanical properties of Al6061-T6 and SS400 welded joints by friction stir welding (FSW). FSW joints with and without TIG welding preheating are characterized and compared in terms of their mechanical and microstructural properties. The results show that the TIG assisted hybrid FSW welded joints (TIG-HFSW) provide an enhanced joint strength. The transversal tensile strength of the TIG-HFSW joints exhibited approximately 104% of the Al6061-T6 base metal tensile strength and was higher than that of the FSW joints. Microstructural investigations also reveal that in the HAZ and TMAZ of TIG-HFSW joints, the grains of Al6061-T6 are smaller than those of the FSW welds.

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Acknowledgments

This work was supported by the Industrial Technology Innovation Program (10049005) funded By the Ministry of Trade, Industry and Energy (MI, Korea).

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Authors and Affiliations

  1. Department of Welding and Joining Science Engineering, Chosun University, Gwangju, Republic of Korea

    HanSur Bang & HeeSeon Bang

  2. Department of Welding and Joining Science Engineering, Graduate School, Chosun University, Gwangju, Republic of Korea

    J. H. Hong, G. H. Jeon & G. S. Kim

  3. Department of Engineering Science and Mathematics, Lulea University of Technology, Lulea, Sweden

    A. F. H. Kaplan

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  1. HanSur Bang
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  2. HeeSeon Bang
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  3. J. H. Hong
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  4. G. H. Jeon
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  5. G. S. Kim
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  6. A. F. H. Kaplan
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Corresponding author

Correspondence to HeeSeon Bang.

Additional information

Translated from Problemy Prochnosti, No. 1, pp. 173 – 181, January – February, 2016.

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Bang, H., Bang, H., Hong, J.H. et al. Effect of Tungsten-Inert-Gas Preheating on Mechanical and Microstructural Properties of Friction Stir Welded Dissimilar Al Alloy and Mild Steel. Strength Mater 48, 152–159 (2016). https://doi.org/10.1007/s11223-016-9750-7

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  • DOI: https://doi.org/10.1007/s11223-016-9750-7

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