Studies on ti 6al 4v to ti 6a l4v and stainless steel brazed joints using low temperature filler metal

Abstract

Titanium joining method follows welding diffusion bonding and brazing have been developed Brazing is a method of permanently joining process which is suitable for similar and dissimilar metal joining applications Brazing is ideal for joining dissimilar metals because it involves the melting of the filler material only which eliminates the problems that occur when dissimilar metals are fused The benefits of titanium brazing in comparison with other joining methods are reduction of energy and heat input reduction of residual stress and a lighter weight structure with the absence of a heat affected zone Titanium brazing filler metals can be characterized as either high temperature or low temperature filler metals High temperature filler metals are based on titanium based alloy systems or palladium based alloy systems newlineLow temperature filler metal can be classified into three groups such as silver newlinebased system aluminum based system and zirconium based systems with brazing temperature below 800 C thus avoiding thermal treatment above the and#945; and#946; transformation The use of a low temperature brazing filler metal is not only essential to produce a strong joint with desired microstructure but also to reduce the total time along with the energy needed to braze the components This study also presents a review of titanium alloys and steel brazing methods using low temperature silver based filler metal On the basis of literature it is stated that titanium alloys can be joined with steel by means of furnace vacuum furnace electron beam brazing ultrasonic brazing and friction stir brazing newline newline