Regensburg 2022 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 18: Poster Session 2

MM 18.9: Poster

Dienstag, 6. September 2022, 17:30–20:00, P2

Resistometric determination of GP-zone formation and growth — •Fabian Miller, Johannes Berlin, Tobias Stegmüller, and Ferdinand Haider — Universität Augsburg,Institut für Physik, 86135 Augsburg, Deutschland

Aluminium alloys are of crucial importance in todays economy, therefore the deeper understanding of their mechanical and electrical properties is important. These properties can be influenced by precipitate formation. In this work we focused in the Al*Cu system with samples containing around 4 wt.% of Cu. They were homogenized at the eutectic temperature and rapidly quenched to ambient temperature. Afterwards 4-point-resistance measurements were conducted during natural and artificial aging. Due to formation of Guinier Preston zones, the resistivity first increases, then slowly decreases, allowing to monitor the unmixing for different temperatures and for different quenching conditions. Further experiments with other alloying metals than Cu will be conducted and variations of the homogenisation temperature are planned to be inspected.