Effect of Friction Stir Welding Parameters on the Micristructure and Hard ness of compocast Al-7Si-2Mg/10% SiCp metal matrix copposites

This paper aimed at studying the Friction Stir Welding (FSW) of Al–7Si–2Mg/10% SiCp metal matrix composites. The effects of tool rotational speed and the number of passes on the resultant microstructure and the final hardness of friction stir welded Al–7Si–2Mg/10% SiCp were studied. The microstructural studies were done using an Optical Microscopy (OM). Also, hardness test was performed in different regions of welded specimens. The results indicated an improvement in hardness of nugget zone in comparison to base metal due to the fragmentation of SiC particles, improved SiC distribution, and refined matrix. By increasing the tool rotational speed and number of passes, a finer matrix was achieved. Also the distribution of SiC particles was improved.

کلیدواژه ها:

Friction stir welding ، Metal matrix composite ، Mechanical properties