Orbital friction stir welding (FSW) has been applied to clad pipes, which is certainly of
interest to the oil and gas industry. In this context, an FSW system capable of performing
sound joints in one pass with full tool penetration was developed. Orbital FSW was executed
in 6 mm thick API X65 PSL2 steel clad pipes with 3 mm thick Inconel 625 using a
polycrystalline cubic boron nitride (pcBN) tool. The metallurgical and mechanical properties
of the joints were investigated. Sound joints with axial forces of 45–50 kN, tool rotational …

In this work, orbital friction stir welding (Orbital FSW) has been now developed in clad pipes,
which is certainly of interest to the oil and gas industry. In this context, a system capable of
performing sound joints in one pass with full tool penetration was developed. Therefore,
orbital FSW was executed in clad pipes of 6 mm thick API X65 PSL2 steel and a 3 mm thick
Inconel 625 with a polycrystalline cubic boron nitride (pcBN) tool. Furthermore, the
metallurgical properties of the welded joints were investigated and discussed. Sound joints …