Berlin 2015 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 7: Microstructure and Phase Transformations II
MM 7.3: Vortrag
Montag, 16. März 2015, 12:15–12:30, H 0106
Influence of the heat treatment on the precipitation behavior on age-hardenable commercial Al-based alloys AA2195. — •Muna Khushaim1, Judith Seibert2, Ferdinand Haider2, and Talaat Al-Kassab3 — 1Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia. — 2University Augsburg, Inst. f. Physics, D - 86159 Augsburg, Germany. — 3D-37077, Göttingen, Germany.
Many aluminum age-hardenable alloys have a good combination of strength and formability and exhibit an attractive enhanced strength/weight ratio. The enhancement of the mechanical properties has largely been attributed to the formation of different precipitates such as: T1 (Al2CuLi), θ′ (Al2Cu), δ′ (Al3Li) and β′ (Al3Zr).The object of this work is to investigate the dependency of the precipitation kinetics on the performed heat treatment conditions. Aluminum- Lithium - copper alloy AA2195 was selected as a model system in the present study. Common industrial heat treatments such as: T8 temper, T4 temper and T6 temper have been examined. Results are obtained by utilizing transmission electron microscopy (TEM), micro-hardness Vickers measurement, differential scanning calorimetry (DSC) and atom probe tomography (APT). In this contribution a detailed analysis of the correlation between the microstructure developments owing to the respective treatment condition and the hardening process will be presented.