Non-basal plasticity in the μ-phase at room temperature

Acta Materialia, vol. 277, pp. 120202

Abstract

We unveil a new non-basal slip mechanism in the μ-phase at room temperature using nanomechanical testing, transmission electron microscopy and atomistic simulation. On the {11¯05} plane, planar faults with a displacement vector of 0.07〈5¯502〉 can be formed by dislocation glide. They do not disrupt the Frank-Kasper packing and therefore enable the accommodation of plastic strain at low temperatures without requiring atomic diffusion. The intersections between the {11¯05} planar faults and basal slip result in stress concentration and crack nucleation during loading.

Authors 9

1. W. Luo Aachen Institute of Physical Metallurgy and Materials Physics

   RWTH Aachen University

   Affiliation as printed

   Institute of Physical Metallurgy and Materials Physics, RWTH Aachen University, Kopernikusstraße 14, 52074 Aachen, Germany

2. Christina Gasper Aachen Institute of Physical Metallurgy and Materials Physics

   RWTH Aachen University

   Affiliation as printed

   Institute of Physical Metallurgy and Materials Physics, RWTH Aachen University, Kopernikusstraße 14, 52074 Aachen, Germany

3. Siyuan Zhang

   Max-Planck-Institut für Nachhaltige Materialien

   Affiliation as printed

   Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Straße 1, 40237 Düsseldorf, Germany

4. Pei-Ling Sun Aachen Institute of Physical Metallurgy and Materials Physics

   RWTH Aachen University

   Affiliation as printed

   Institute of Physical Metallurgy and Materials Physics, RWTH Aachen University, Kopernikusstraße 14, 52074 Aachen, Germany

5. Nisa Ulumuddin Aachen Institute of Physical Metallurgy and Materials Physics

   RWTH Aachen University

   Affiliation as printed

   Institute of Physical Metallurgy and Materials Physics, RWTH Aachen University, Kopernikusstraße 14, 52074 Aachen, Germany

6. Yury V. Lysogorskiy

   Ruhr University Bochum

   Affiliation as printed

   ICAMS, Ruhr-Universität Bochum, Universitätsstraße 150, 44801 Bochum, Germany

7. Ralf Drautz

   Ruhr University Bochum

   Affiliation as printed

   ICAMS, Ruhr-Universität Bochum, Universitätsstraße 150, 44801 Bochum, Germany

8. Zhuocheng Xie corresponding Aachen Institute of Physical Metallurgy and Materials Physics

   RWTH Aachen University

   Affiliation as printed

   Institute of Physical Metallurgy and Materials Physics, RWTH Aachen University, Kopernikusstraße 14, 52074 Aachen, Germany

9. Sandra Korte‐Kerzel corresponding Aachen Institute of Physical Metallurgy and Materials Physics

   RWTH Aachen University

   Affiliation as printed

   Institute of Physical Metallurgy and Materials Physics, RWTH Aachen University, Kopernikusstraße 14, 52074 Aachen, Germany