Events

Seminar of International Laboratory of High Magnetic Fields and Low Temperatures PAS

High strength conductors for pulsed high field magnets: development of Cu-Ag-Zr materials

Jens Freudenberger, Felix Thiel, Alexander Kauffmann, Song Yin, Florian Bittner, Hansjoerg Klauss and David Rafaja

Leibniz Institute for Solid State and Materials Research Dresden, Institute for Metallic Materials, Germany

Cu-Ag-Zr alloys show a beneficial combination of high mechanical strength and good electrical conductivity making these materials suitable for winding coils for the use as pulsed high field magnets. The mechanical as well as electrical properties of Cu-Ag-Zr alloys are strictly related to their microstructure, which can be adjusted by manufacturing processes. This study shows the effect of cryogenic wire drawing of dynamically recrystallized Cu and Cu-based alloys on its microstructure in comparison to material which has been deformed at room temperature. The different microstructural features such as grain size, dislocation density as well as precipitate size and their morphology were assessed. In addition, the formation of mechanical twins during cryogenic deformation is reflected. The mechanical and electrical properties of the alloy are explained upon the observed microstructure.