Electron beam welding of 4J36 invar alloy to TC4 titanium alloy using Cu-Nb composite diffused metal interlayer

Electron beam welding of 4J36 invar alloy and TC4 titanium alloy was carried out with Cu-Nb composite diffused metal interlayer. The results showed that the depth to width ratio and the tensile strength of welded joints increased with the increase of electron beam current. Under the designed process parameters, two melting zones (MZ) in welded joints formed solid solutions (ss), the welded joint tensile strength reached maximum value of 244.1 MPa, and the fracture location was mainly located at 4J36/Cu interface.

Automated summary

Electron beam welding of 4J36 invar alloy and TC4 titanium alloy was conducted using Cu-Nb composite diffused metal interlayer. The depth to width ratio and the tensile strength of the welded joints increased with the increase of electron beam current. Under the designed process parameters, two melting zones formed solid solutions in the welded joints, achieving a maximum tensile strength of 244.1 MPa, with the fracture location mainly located at the 4J36/Cu interface.