Particulate metal matrix composites and their fabrication via friction stir processing – a review

ABSTRACT

Particulate-reinforced metal matrix composites are of particular interest because of their ease of fabrication, low cost, and isotropic properties. Friction stir processing offers a promising alternative in the fabrication of surface as well as bulk metal matrix composites. Its very nature aids in the microstructural refinement of the matrix material, avoids the formation of detrimental phases and provides flexible control of the process. Over the period, the technique was successfully applied in the synthesis of various composites. This paper conducts a critical review of the current trends and strategies used to enhance friction stir process efficiency during fabrication of particulate metal matrix composites. It discusses a few of the key underlying principles necessary for making the right combination of matrix and reinforcement. The exhaustive comparative study presented in this article helps in identifying matrix/reinforcement combinations that are yet to be addressed. In the end, a few crucial observations are summarized and important suggestions are provided for future work.

KEYWORDS:

• Metal matrix composites
• particulate reinforcement
• friction stir processing
• strengthening mechanisms

Acknowledgments

One of the authors (Mr Padmakumar A. Bajakke) thank the Minority Welfare Department, Directorate of Minorities, Government of Karnataka, for granting fellowship vide registration No. DOM/FELLOWSHIP/CR-15/2018-19 for pursuing PhD.