Friction stir processing is widely used for Al MMCs for its superior grain refinement leading to enhanced mechanical strength. You may try the combination of stir and squeeze casting.

For Development of Al-MMCs several new techniques are available such as sandwich processing, friction stir processing, vapor deposition process, microwave assisted processes, disintegrate melt deposition (DMD). The newly developed strategy provides better strength, stability and reduced scrap level compare to conventional process.

Further reading can be found here :

Article Developments in the aluminum metal matrix composites reinfor...

Thank you.

Hello Sudheer Kumar

Friction Stir processing is the latest technique used for the fabrication of MMCs due to their benefits like grain refinement which improves the strength as mentioned by P. Samal as well. Moreover, if you think for the cost of fabrication, stir casting process is the cheapest of all the fabrication methods and each fabrication method has its own pros and cons which you can get from the literature.

Good luck

PVR