Friction Stir Processing of Precipitate Hardenable Al Alloys 6061 and 7075: A Review

Abstract

Friction Stir Processing (FSP) is one of the promising thermomechanical processing techniques that modifies the microstructural and mechanical properties of the material. This is solid state joining technique and energy efficient, environment friendly. Previous studies of different FSP of alloys report the contamination of processed zone consisting of fine grained and homogeneous microstructure. The advantage in FSP is that it has maximum temperature reaching capacity of less than 80% to 85% of the melting temperature. In this review work, the precipitation hardenable aluminium alloys 6061 and 7075 were FSP under various combinations of speeds such as rotational and translation speed are studied. Correlation between the microstructure and strength properties during process is one of the important issue in FSP optimization. This review aims at to collect large amount of information about FSP of precipitation hardenable aluminium alloys which is used worldwide and study its mechanical properties more specifically.