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Influence of SMAT Parameters on Microstructural and Mechanical Properties of Al-Mg-Si Alloy AA 6061

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Abstract

In the present work, the influence of surface mechanical attrition treatment (SMAT) parameters on the microstructural and mechanical properties of an aluminum-magnesium-silicon alloy AA 6061 was studied using design of experiment technique. Balls of three different diameters were used, and SMAT was done for three different durations. The microstructural features of the surface layer fabricated by SMAT were characterized by cross-sectional scanning electron microscopic observations, x-ray diffraction technique and transmission electron microscopy. The microindentation hardness, nanoindentation hardness and surface roughness were determined. Due to SMAT, nanocrystallites formed on the surface and near-surface regions, and hardness and surface roughness increased. The ball diameter was the most influencing SMAT parameter compared to the treatment duration. However, interaction between ball diameter and treatment duration could not be ignored. Regression equations were developed relating the process parameters to the surface properties. The ball diameter and treatment duration could thus be properly selected as per the required values of roughness and/or the hardness.

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Author notes

  1. S. Anand Kumar

    Present address: Department of Mechanical Engineering, School of Engineering, Dayananda Sagar University, Bengaluru, Karnataka, India

Authors and Affiliations

  1. Department of Mechanical Engineering, ACS College of Engineering, Bengaluru, Karnataka, India

    S. Anand Kumar

  2. Quality Assurance Division, Nuclear Fuel Complex, Hyderabad, India

    P. Satish Kumar

  3. Department of Metallurgical and Materials Engineering, IIT Madras, Chennai, India

    S. Ganesh Sundara Raman

  4. Department of Dental Biomaterials, Chonbuk National University, Chonju, South Korea

    T. S. N. Sankara Narayanan

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  1. S. Anand Kumar
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  4. T. S. N. Sankara Narayanan
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Correspondence to S. Anand Kumar.

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Anand Kumar, S., Satish Kumar, P., Ganesh Sundara Raman, S. et al. Influence of SMAT Parameters on Microstructural and Mechanical Properties of Al-Mg-Si Alloy AA 6061. J. of Materi Eng and Perform 26, 1947–1957 (2017). https://doi.org/10.1007/s11665-017-2612-z

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  • DOI: https://doi.org/10.1007/s11665-017-2612-z

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