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Influence of TiO2 Particle on the Friction Stir Welding of 7075 Al Alloy

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Processing and Characterization of Materials

Part of the book series: Springer Proceedings in Materials ((SPM,volume 13))

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Abstract

The effect of TiO2 particles on the mechanical and corrosion properties of the friction stirred welded 7075 aluminium alloys were studied. Surface topography of the welded samples was carried out with a scanning electron microscope (SEM). Energy dispersive spectroscopy (EDS) was performed to analyze the presence of TiO2 particles in the weld. The tensile strength of the base 7075 Al alloy was compared with the reinforced and unreinforced weld. The tensile strength of the base alloy is high as compared to weld alloy. The drastic decrease in tensile strength of the welded sample may be ascribed to the dynamic recrystallization followed by grain growth which is the consequence of heat generated due to the friction between the tool and weld material. Residual stresses generated due to welding also affect the strength of the weld. However, the tensile strength of the reinforced alloy is found to be more in contrast to the unreinforced 7075 aluminium alloy. It can be interrelated to the existence of TiO2 particles which is incorporated in the matrix. The fracture surface was examined through SEM. Overall it shows the ductile mode of fracture. However, in the presence of TiO2 particle, there is evidence of both intergranular and transgranular fracture. The corrosion behavior was studied by conducting potentiodynamic polarization test with 3.5 wt% NaCl solution. The base alloy shows more corrosion resistance than the unreinforced and reinforced weld.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, Veer Surendra Sai University of Technology, Burla, 768018, Odisha, India

    Gautam Behera, Subhadra Sahoo, Nigamananda Ratha, Abhijit Rout & Manila Mallik

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  1. Gautam Behera
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  2. Subhadra Sahoo
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  3. Nigamananda Ratha
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  4. Abhijit Rout
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  5. Manila Mallik
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Editors and Affiliations

  1. Metallurgical and Materials Engineering, National Institute of Technology Rourkela, Rourkela, India

    Snehanshu Pal

  2. Materials and Metallurgical Engineering, National Institute of Foundry and Forge, Ranchi, Jharkhand, India

    Debdas Roy

  3. Metallurgical and Materials Engineering, National Institute of Technology Raipur, Raipur, India

    Sudip Kumar Sinha

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Behera, G., Sahoo, S., Ratha, N., Rout, A., Mallik, M. (2021). Influence of TiO2 Particle on the Friction Stir Welding of 7075 Al Alloy. In: Pal, S., Roy, D., Sinha, S.K. (eds) Processing and Characterization of Materials. Springer Proceedings in Materials, vol 13. Springer, Singapore. https://doi.org/10.1007/978-981-16-3937-1_17

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