journal article·2024-09Open access

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

W. Luo, C. Gasper, S. Zhang, P.L. Sun, N. Ulumuddin, A. Petrova, Y. Lysogorskiy, R. Drautz, Z. Xie, S. Korte-Kerzel

Acta Materialia· Volume 277

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.
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Research context

OpenAlex topics: Microstructure and mechanical properties · Ion-surface interactions and analysis · Force Microscopy Techniques and Applications

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