Abstract
The possibility of two pass welding for TA2/T2 bimetallic sheets joint with laser-TIG hybrid weldings was studied. Laser-gas tungsten arc welding (TIG) hybrid welding of TA2/T2 bimetallic sheets has been applied using BCuP-2 wire as filler metal. A new welding process for TA2/T2 butt joint was introduced on the basis of the controlling the formation of Ti-Cu intermetallics in the joint. One process was two pass welding involving creation of a joint with one laser weld and one TIG weld separated by remaining unmelted TA2/T2 interface. When laser beam on the TA2 side junction surface, T2 would not be completely melted in joint. When TIG welding in groove, the filler metal melted occurred at the TA2 and T2 interfaces. Through two pass welding, the the formation of Ti-Cu intermetallics can be completely avoided during welding. In the paper, microstructure and mechanical characterization of Ti/Cu clad plates laser and arc welded joints were carried out. The unmelted part of TA2/T2 explosive interface acted as a diffusion barrier between Ti and Cu. The unmelted TA2/T2 explosive interface was beneficial to relieve and accommodate the thermal stress. The joint fractured mainly at the brazed weld with the maximum tensile strength of 610 MPa.
Highlights
Titanium and its alloys have excellent comprehensive properties, namely high specific strength, high specific modulus, toughness, corrosion resistance and high damage resistance [1]
We proposed a novel method called laser beam and tungsten arc welding (TIG) superposition welding, and the main purpose was to avoid the mixing of Ti and Cu to prevent the appearance of Ti-Cu intermetallics in the joint
Due to the T2 surface did not melt during the first welding pass, the Ti-Cu intermetallic compounds were not formed in the WZ1
Summary
Titanium and its alloys have excellent comprehensive properties, namely high specific strength, high specific modulus, toughness, corrosion resistance and high damage resistance [1]. Copper and its alloys have excellent electrical conductivity, thermal conductivity and ductility, good cold and hot workability, high oxidation resistance and corrosion resistance [2]. The effective jointing of Ti/Cu dissimilar materials can meet the requirements of thermal conductivity, conductivity, corrosion resistance, wear resistance, and meet the requirements of high strength but light weight. It will have broad application prospects in aerospace, instrumentation, electronics, chemical and other fields. Kahraman and Advances in Materials 2020; 9(3): 55-58
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
