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MM: Fachverband Metall- und Materialphysik

MM 41: Topical Session: Defect Phases III

MM 41.3: Vortrag

Donnerstag, 30. März 2023, 16:30–16:45, SCH A 216

Orientation relationship and interface inclination in dependence of heat treatment time between Al2Ca and Mg Matrix — •Lukas Berners¹, Zhuocheng Xie¹, Mattis Seehaus¹, Siyuan Zhang², and Korte-Kerzel Sandra¹ — ¹IMM, RWTH Aachen — ²MPIE, Düsseldorf

Mechanical properties of two phase-alloys are highly dependent on the morphology of the second phase as well as the interface character. Analysis of the orientation-relationship between the magnesium matrix and C15 (Al2Ca) Laves phase precipitate is up to now mainly conducted via TEM analysis. However, where defect phases as thermodynamically stable interface configurations are to be identified, a more statistically significant approach is needed. To this end, we use large scale EBSD to reveal prevalent orientation relationships as well as interface character during the transition from hexagonal C36 phase to cubic C15 phase during heat treatment at 500 °C and thus unravelling a pathway to the thermodynamically stable interface configuration.