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Effect of Heat Input on Mechanical and Metallurgical Properties of Friction Stir Welded AA6061-10% SiCp MMCs

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Abstract

Metal matrix composites (MMCs) reinforced with SiC particles combine the matrix properties with those of the ceramic reinforcement, leading to higher stiffness and superior thermal stability with respect to the corresponding unreinforced alloys. However, their wide application as structural material needs proper development of a suitable joining process. In this investigation, an attempt was made to study the effect of heat input on the evolution of microstructure in weld region of friction stir welded AA6061-10% SiCp MMCs. The tensile properties of the joints were evaluated and they are related with microstructure and heat input of the process. The microstructure characterization of the weld zone shows evidence of a substantial grain refinement of the aluminum matrix and fracturing of reinforcement particles due to dynamic recrystallization induced by the plastic deformation and frictional heating during welding.

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Acknowledgments

The authors are grateful to the Center for Materials Joining and Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar, India, for extending the facilities of Metal Joining and Material Testing to carry out this investigation.

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Authors and Affiliations

  1. Department of Mechanical Engineering, St. Peter’s Engineering College, Chennai, 600054, Tamil Nadu, India

    P. Periyasamy

  2. Department of Production Technology, MIT, Anna University, Chennai, 600044, Tamil Nadu, India

    P. Periyasamy & B. Mohan

  3. Department of Manufacturing Engineering, Centre for Materials Joining & Research (CEMAJOR), Annamalai University, Annamalainagar, 608002, Tamil Nadu, India

    V. Balasubramanian

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  1. P. Periyasamy
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Correspondence to P. Periyasamy.

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Periyasamy, P., Mohan, B. & Balasubramanian, V. Effect of Heat Input on Mechanical and Metallurgical Properties of Friction Stir Welded AA6061-10% SiCp MMCs. J. of Materi Eng and Perform 21, 2417–2428 (2012). https://doi.org/10.1007/s11665-012-0176-5

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  • DOI: https://doi.org/10.1007/s11665-012-0176-5

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