Berlin 2015 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 42: Mechanical Properties I

MM 42.6: Vortrag

Mittwoch, 18. März 2015, 17:15–17:30, TC 010

Work hardening of Cu based conductors by deformation under cryogenic conditions — •Jens Freudenberger¹, Felix Thiel^1,2, Alexander Kauffmann^1,3, 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.