Dresden 2020 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 60: Mechanical Properties: Plasticity, fracture, fatigue, wear - I
MM 60.3: Talk
Thursday, March 19, 2020, 16:15–16:30, IFW B
Exploring slip across Laves phase interface in magnesium alloy — •Julien Guénolé1,2, Muhammad Zubair1, and Sandra Korte-Kerzel1 — 1Institute of Physical Metallurgy and Materials Physics, RWTH Aachen University, Germany — 2LEM3 - CNRS, Metz, France
The mechanical behaviour of Mg-Al alloys can be largely improved by the formation of an intermetallic Laves phase skeleton, in particular the creep strength. Recent nanomechanical studies revealed plasticity by dislocation glide in the Mg2Ca Laves phase, even at room temperature. As strengthening skeleton, this phase remains however brittle at low temperature. In this work, we present experimental evidences of slip transfer from the Mg matrix to the Mg2Ca skeleton at room temperature. We further explore the associated mechanisms by means of atomistic simulations and identify two type of slip transfer depending on the crystallographic orientation: a direct and an indirect slip transfer.