Regensburg 2022 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 4: Structural Materials
MM 4.2: Vortrag
Montag, 5. September 2022, 10:30–10:45, H46
Intrinsic room temperature ductilisation of lean rare-earth free ternary Mg alloys — •Wassilios Delis1, Pia Huckfeldt1, Bengt Hallstedt2, Pei-Ling Sun1, Dierk Raabe3, Sandra Korte-Kerzel1, and Stefanie Sandlöbes-Haut1 — 1Institute for Physical Metallurgy and Materials Physics, RWTH Aachen, 52074 Aachen, Germany — 2Institute for Materials Applications in Mechanical Engineering, RWTH Aachen, 52062 Aachen, Germany — 3Max-Planck Institut für Eisenforschung, Max-Planck-Straße 1, 40237 Düsseldorf, Germany
Mg is a lightweight structural material with a good specific strength. Unfortunately, it lacks good room temperature formability and therefore a wider commercial use of Mg is hindered. The preferred basal slip and strong basal-type texture were found to be the main reasons for the poor room temperature formability. For basal slip the von Mises' criterion is not fulfilled. Recent experimental and simulative studies tried to activate more slip systems without changing the mechanical properties with alloying approaches. Alloys containing Y and rare-earth elements showed a highly increased room-temperature ductility. Since Y and rare-earth elements are costly further research has been carried out to identify similar acting alloy systems. For this purpose, the parameter I1 SFE has been used and the system Mg-Al-Ca was identified to have a similar I1 SFE. In experiments the system indeed showed the expected increased room temperature ductility. Further research of the effects of the chemical composition on the ductilisation has now been performed.