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arXiv · 2308.08931

Origins of limited 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
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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. The (1-105) planar faults with a displacement vector of 0.07[-5502] 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 (1-105) planar faults and basal slip result in stress concentration and crack nucleation during loading.

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W. Luo, C. Gasper, S. Zhang, P. L. Sun, N. Ulumuddin, A. Petrova, Y. Lysogorskiy, R. Drautz, Z. Xie, S. Korte-Kerzel. 2024-02-15. Origins of limited non-basal plasticity in the μ-phase at room temperature. https://arxiv.org/abs/2308.08931

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