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%0 Thesis
%A Delis, Wassilios Johannes
%T Investigation of solid solution effects on texture and dislocation activity in wrought lean-alloyed ternary Mg-Al-Ca alloys
%I Rheinisch-Westfälische Technische Hochschule Aachen
%V Dissertation
%C Aachen
%M RWTH-2024-03843
%P 1 Online-Ressource : Illustrationen
%D 2024
%Z Veröffentlicht auf dem Publikationsserver der RWTH Aachen University
%Z Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2024, Kumulative Dissertation
%X The development of high strength and ductile Mg alloys is a major focus due to Mg’s lightweight properties, which make it valuable in industries such as automotive and aerospace, as well as ist potential to reduce greenhouse gas emissions. However, Mg alloys face challenges in terms of room temperature formability. Research has explored various parameters, including texture modification and alloying with elements like Y and rare-earth elements to improve ductility. Recent studies suggest that the addition of Y and rare-earth elements activates non-basal slip systems, thereby improving formability. A joint computational and experimental study found the Mg-Al-Ca systemto be promising, offering similar properties with low cost elements.This work aims at a deeper understanding of the Mg-Al-Ca system by investigating the elemental effects on mechanical properties, texture and slip system activity. Different alloying compositions were synthesised and analysed while maintaining the same processing parameters. It was shownthat the addition of Al and Ca significantly increases the strength and ductility of Mg, but onlythe combination of both Al and Ca gives to the highest values of both. Ca has an intrinsic grainrefinement effect on the alloy, pinning the grain boundaries and therefore leading to weaker basaltextures. Also, the amount of Ca is important as Al reduces the solubility of Ca in Mg. Adjustingthe alloying contents of Ca and Al not only allows weak as-recrystallised textures but also allowsweak textures to be maintained during further cold rolling. In general, the effect of Ca on bothgrain refinement and texture can be seen at very low Ca additions (0.005 wt.-
%F PUB:(DE-HGF)11
%9 Dissertation / PhD Thesis
%R 10.18154/RWTH-2024-03843
%U https://publications.rwth-aachen.de/record/984074