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Effects of Brass Interlayer on Mechanical Properties of Friction Stir Welded AA 6061-T6 Joint

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Abstract

The most important issues in the joining of similar aluminum alloy are softening of weld zone and reduction in tensile strength of joints. Use of a metallic interlayer can resolve these issues. In the present research work, effect of brass interlayer on the properties of friction stir welded 6061-T6 aluminum alloy was studied. X-ray diffraction analysis was carried out to investigate the phase composition with brass interlayer. Al2Cu and Al4Cu9 intermetallic compounds were formed at the welded zone. Mechanical properties were examined through the tensile and microhardness testing. Tensile test results reveal that the use of brass interlayer is a good solution to improve the joint strength, as the insertion of brass interlayer enhances the joint strength up to 36%. In addition, use of brass interlayer enhances the microhardness at the weld zone and the softening issue has been resolved to some extent. Field emission scanning electron microscopy was used to investigate the mechanism of fracture behavior in fractured tensile specimens. However, insertion of brass interlayer slightly changes the ductile fracture toward brittle fracture.

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Acknowledgements

The authors would like to express their sincere thanks to TEQIP III Government of India for their Financial support (Minor Research (SEED) Grant) and NIT Jamshedpur, MNNIT Allahabad, NIT Rourkela and Auto cluster Jamshedpur, for their experimental and characterization support. The authors would like to thank Prof. Mukul Shukla, Dr. Tarun Bhardwaj, Mr. Rajneesh Verma, Mr. Amit Kumar Singh Chauhan, Mr. Yogendra Pratap Singh and Mr. Iqbal Ansari for their valuable contributions in the successful conduction of experiments.

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  1. Department of Production and Industrial Engineering, NIT, Jamshedpur, India

    Rishabh Swarnkar, Sohan Chaudhary, Ashish Das, Shashi Bhushan Prasad, Mukesh Kumar & Raj Ballav

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  1. Rishabh Swarnkar
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  2. Sohan Chaudhary
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  3. Ashish Das
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  4. Shashi Bhushan Prasad
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  5. Mukesh Kumar
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Correspondence to Ashish Das.

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Swarnkar, R., Chaudhary, S., Das, A. et al. Effects of Brass Interlayer on Mechanical Properties of Friction Stir Welded AA 6061-T6 Joint. Trans Indian Inst Met 74, 705–711 (2021). https://doi.org/10.1007/s12666-020-02156-8

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  • DOI: https://doi.org/10.1007/s12666-020-02156-8

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