Abstract
A unique crack growth behavior was detected during room temperature cyclic loading of a eutectic high entropy alloy, which caused the occurrence of two-stage cyclic hardening under the low cycle regime in tensile and compressive half cycles. This was attributed to the crack trapping between the dendritic branch, which caused retardation of the growth stage until the crack sheared and pass through the dendrite. The mechanical fragmentation of the dendrite and distribution through the microstructure could effectively resist crack propagation. This led to higher stress levels during cyclic loading compared with monotonic loading under both tensile and compressive modes of deformation.
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