MECHANICAL AND STRUCTURAL CHARACTERISTICS OF FRICTION WELDED Ti-6 Al-4 V + X 5 CrNi 18-10 DISSIMILAR JOINTS

Friction welding occupies a definite place in many manufacturing industries where the used methods for joining dissimilar materials were not fully exhausted. Measurands of process ( rotation speed, pressure, time) can be easily adjusted and allow to obtain quality joints with reproducible properties. However, joining dissimilar material combinations, for example between titanium alloy with biphasic structure and austenitic stainless steel, is a critical issue related to the risk of developing fissures and cracks, the formation of intermetallic phases, a high gradient of residual stresses, etc. This paper approaches the metallurgical incompatibility of two these materials for welding and defines the experimental conditions to obtain quality joints.