ABSTRACT
Generally, welding of dissimilar metals is warranted in two cases: first, when a combination of two metals is required over a span of length to achieve complementary properties, and second, when the service condition on either side of the welding point is suitable for different environments and suits two different materials. This is often a complicated process owing to the fact that the two materials may not be a natural fit for each other. The welding parameters suitable for one material may not suit the other. Hence, the differing material properties, such as melting point, density, thermal and electrical conductivity, crystal structure, mutual diffusionability, ductility, etc., affect the joining process. Despite all these difficulties, dissimilar welding has been increasingly adopted for a multitude of applications described by the authors in this chapter (though it is not limited to these).
