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.

在共晶高熵合金的室温循环加载期间检测到一种独特的裂纹扩展行为，这导致在拉伸和压缩半循环的低循环状态下发生两阶段循环硬化。这归因于枝晶分支之间的裂纹捕获，这导致生长阶段延迟，直到裂纹剪切并穿过枝晶。枝晶的机械破碎和通过微观结构的分布可以有效地阻止裂纹扩展。与拉伸和压缩变形模式下的单调加载相比，这导致循环加载期间的应力水平更高。