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

W Luo and C Gasper and S Zhang and P Sun and N Ulumuddin and A Petrova and Y Lysogorskiy and R Drautz and Z Xie and S Korte-Kerzel, ACTA MATERIALIA, 277, 120202 (2024).

DOI: 10.1016/j.actamat.2024.120202

We unveil a new non-basal slip mechanism in the mu-phase at room temperature using nanomechanical testing, transmission electron microscopy and atomistic simulation. On the 1105 plane, 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 1105 planar faults and basal slip result in stress concentration and crack nucleation during loading.

Return to Publications page