Kinking in a refractory TiZrHfNb0.7 medium-entropy alloy

As a type of cooperative deformation like twinning, kinking can improve the deformability of materials by stress relaxation and crystal reorientation. In this work, kinking with < 0 1 1 > lattice rotation axis was identified in a refractory TiZrHfNb0.7 medium-entropy alloy (MEA). Through intragranular misorientation axis (IGMA) analysis, the {1 1 2} < 1 1 1 > dislocation slip was determined. The formation of intensive band structure in 70% cold rolled alloy was attributed to continuous nucleation and propagation of kink bands in coarse grains. (C) 2020 Elsevier B.V. All rights reserved.