Mechanical Properties of Al 6061-SiCp Metal Matrix Composite Weld Joints Made using Friction Stir Welding

Abstract

Al 6061 metal matrix composites with SiCp are increasingly becoming popular in automobile, aerospace and electronics industries, in view of their excellent mechanical properties and wear resistance. The present study is focussed on weld joint characteristics of Al 6Al 6061+ 20% SiC metal matrix composite of 6mm thickness plates welded with Friction Stir Welding process. A number of welding trials with rotational speedsin the range of 1000-1500 rpm and with a constant welding speed (1.25mm/min) and axial load (7 KN) were made. The joints were assessed for their mechanical properties. Weld joints made with a rotational speed of 1200 rpm showed significantly higher strength as compared to joints with other rotational speeds. The reason for higher strength has also been explained based on micro-structural characteristics.
DOI: 10.17762/ijritcc2321-8169.150745