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Effect of the Post-weld Heat Treatments on Mechanical and Corrosion Properties of Friction Stir-Welded AA 7075-T6 Aluminium Alloy

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Book cover Strengthening and Joining by Plastic Deformation

Part of the book series: Lecture Notes on Multidisciplinary Industrial Engineering ((LNMUINEN))

Abstract

Age hardenable, high-strength aluminium alloys are used majorly in aerospace, defence, marine and automobile components because of their excellent strength-to-weight ratio and better corrosion resistance. To join such nonferrous alloys, friction stir welding (FSW) is a special technique, which uses the phenomenon of friction and deformation while joining in the solid state. The joint sections of 2XXX, 6XXX and 7XXX series of aluminium alloys are susceptible to microstructural changes during FSW due to their ageing characteristics. These changes further aggravate the problem of mechanical engineering properties, and especially the corrosion resistance of these alloys. In the present work, focus is kept on the effect of post-weld heat treatments (PWHT) such as retrogression and re-ageing (RRA) and stabilization with double ageing (SDA) on mechanical properties, electrical conductivity and exfoliation corrosion resistance of AA 7075 aluminium alloy FSW joints.

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Acknowledgments

The authors are grateful to Dr. Dilip Peshwe, Professor, Department of Metallurgy and Materials Engineering, VNIT, Nagpur and Center of Excellence of Metallurgy and Materials Engineering, MIT Aurangabad for providing support to carry out the characterization.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Marathwada Institute of Technology, Aurangabad, 431010, Maharashtra, India

    S. B. Pankade, P. M. Ambad, R. Wahane & C. L. Gogte

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  1. S. B. Pankade
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  4. C. L. Gogte
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Correspondence to S. B. Pankade .

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Editors and Affiliations

  1. Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India

    Uday Shanker Dixit

  2. Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India

    R. Ganesh Narayanan

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Pankade, S.B., Ambad, P.M., Wahane, R., Gogte, C.L. (2019). Effect of the Post-weld Heat Treatments on Mechanical and Corrosion Properties of Friction Stir-Welded AA 7075-T6 Aluminium Alloy. In: Dixit, U., Narayanan, R. (eds) Strengthening and Joining by Plastic Deformation. Lecture Notes on Multidisciplinary Industrial Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-0378-4_4

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  • DOI: https://doi.org/10.1007/978-981-13-0378-4_4

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