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MM: Fachverband Metall- und Materialphysik
MM 17: Postersession I
MM 17.27: Poster
Monday, March 16, 2015, 18:00–20:00, Poster E
Atom probe tomography studies of the effects of industrial heat treatment on the precipitation kinetics on aluminum alloy 2195 — •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.
Aluminum lithium alloys are of great interest for commercial, military and aerospace applications. These alloys possess high strength, light weight, low density and good mechanical properties.The superior mechanical properties of this alloy is owing to the presence of different intermetallic phases such as T1 (Al2CuLi), θ′ (Al2Cu), δ′ (Al3Li) and β′ (Al3Zr).The objective of this work is to provide insight into the relationship between precipitation sequences, mechanical properties and the preformed heat treatment conditions. Aluminum alloy 2195 was selected as a model system in the present study. Different industrial heat treatments such as: T8 temper, T4 temper and T6 temper were applied on the alloy. Utilizing laser assisted wide angle tomographic atom probe (LAWATAP) and local electrode atom probe (LEAP) allowed the investigation of precipitation kinetics and phase transformation phenomena. Data will be presented will highlighting the role of the industrial heat treatment on the developing of the microstructure, along with an in depth study of distribution of different alloying elements in the strengthening phases.