Abstract
| Coated superconducting radio-frequency (SRF) cavities are planned to be implemented in the Future Circular
Collider (FCC) at the European Organization for Nuclear Research (CERN). The interest in industrialized and
high-performance processes for fabrication of the corresponding copper substrates has thus risen. Tubular
hydroforming is a well-known industrial process, but has not been thoroughly applied for ultra-pure oxygenfree electronic copper (Cu-OFE) thick products. To provide a feasibility analysis for the optimized fabrication
process of copper substrate seamless cavities, a Forming Limit Diagram (FLD) of the material of interest was
studied. In this paper, the methodology, test results and initial benchmark of the material model is presented, for
4 mm and 2 mm thick sheets. |