Friction plug welding, a recent variation of friction welding is a process of joining of two similar or dissimilar materials. The joint efficiency can be enhanced by applying external heat source or pre-heating at the work piece surfaces. Heat flux generation at intermediate surface is computed due to friction between the materials considering the co-efficient of friction. The land width is varied by varying the diameter of the plug to find its effect on the temperature profile. Analytical modeling is carried out with and without the effect of pre-heating. Temperature distribution in the work piece was calculated for different plug diameter with different values of pre-heating temperature ranging from 300oC-600oC. It is observed that while decreasing the land width there is a linear fall in temperature profile. With preheating, higher peak temperature is achieved at less friction time. High quality weld could be achieved with less processing time.
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