Abstract
Friction stir welded Mg AZ31B alloy have been investigated. Friction stir welding (FSW) is carried out at different rotational speeds of 900rpm, 1120rpm, 1400rpm and 1800rpm and with change of tool materials such as High speed steel (HSS) and Stainless steel (SS) at a constant welding speed of 40mm/min, tilt angle of 2.50 and axial force of 5 KN. It is observed In this study, the effect of tool material and rotational speed on microstructure and mechanical properties of that the joint fabricated using SS tool material at a rotational speed of 1120rpm obtained higher mechanical properties as compared to those of 900rpm, 1400rpm and 1800rpm and also to those of HSS material.
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