Investigation on joining of dissimilar materials in a newly developed low cost friction stud welding machine

Abstract

Welding of aluminum based materials to steel is of particular interest to the engineers because the resulting products combine the very different but favourable properties of each material The resulting products have a desirable combination of high thermal conductivity and low density of aluminum and low thermal conductivity and the high tensile strength of steels The demand for aluminum and aluminum matrix composite steel joints and has therefore increased in many significant applications including cryogenics structural engineering marine engineering nuclear engineering spacecraft rocket fuel tanks and high vacuum chambers owing to their superior properties In all these critical applications the strength of the dissimilar joint and joint interfacial properties are very important Failure in these joints is a matter of great concern since that would result in massive losses However welding of dissimilar materials has great difficulties because of the formation of inter metallic compounds, presence of oxides at the interfacial region inferior weld strength at the inner region of the joint interface and more quantity of material consumption during the joining process newline