Reduction of metallurgically induced pore formation during arc welding of pure copper by XHV-adequate conditions in the arc welding process (B06*)

• Subject Area: Primary Shaping and Reshaping Technology, Additive Manufacturing ; Joining and Separation Technology
• Term: since 2024
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 394563137

Pure copper has a high electrical and thermal conductivity, which substantially depends on the oxygen content of the material. Since copper has a high affinity to oxygen, thermal joining processes are therefore to be regarded as critical. Even under shielding gas, oxygen-uptake cannot be prevented. Hence, arc welding of high-purity copper in an XHV-adequate oxygen-free process atmosphere will be developed in the subproject. A comprehensive model starting from the temperature development in the plasma and the corresponding dissolution of the process gases, to the final component purity will be developed.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 1368: Oxygen-free production - processes and local mechanisms in oxygen-free atmosphere for the development of sustainable production techniques and manufacturing processes
• Applicant Institution: Gottfried Wilhelm Leibniz Universität Hannover
• Project Head: Dr.-Ing. Thomas Hassel