Berlin 2015 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 42: Mechanical Properties I
MM 42.6: Talk
Wednesday, March 18, 2015, 17:15–17:30, TC 010
Work hardening of Cu based conductors by deformation under cryogenic conditions — •Jens Freudenberger1, Felix Thiel1,2, Alexander Kauffmann1,3, and David Rafaja2 — 1IFW Dresden — 2TU Bergakademie Freiberg — 3KIT
Cu-Ag-Zr alloys show a beneficial combination of high mechanical strength and good electrical conductivity making these materials suitable for a variety of applications, which strongly rely on this combination of properties. 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-Ag7-Zr0.3 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.