Abstract :
This paper presents a few applications of multi-material systems. These systems provide scope for either
reducing weight or cost of a product. The system employs either two or more metals within a component. Each of
these will contribute to the functioning of the product as per their assigned role. The system consists of dissimilar
metals. This imposes a great challenge to join them permanently without defects. This demands advanced welding
techniques like Electron Beam welding (EBW), Laser Beam Welding (LBW), Diffusion Bonding (DB), Friction
Welding (FW), Friction Stir Welding (FSW), Explosive Welding (EXW) and special filler metals. Mismatch in the
material properties exists across the interface between the constituent metals. A few examples of multi-material
systems include bimetallic worm gear; bimetallic gas turbine disc; multi-metal gear; bimetallic transition strips;
dissimilar welded pipe and multi-layered bimetal laminate composites.
Keyword :
Multi-metal, Bimetallic, Mismatch, Worm gear, Turbine disc, Transition strip.