Fatigue tests were conducted on an equiatomic CrMnFeCoNi high-entropy alloy with three different micro-stress concentration sources. A fatigue crack behavior analysis using a replica of a specimen surface, fractographic analysis in a fracture surface, fatigue crack shape analysis, and strain analysis under the fracture surface were performed. It was found that the fatigue crack extension mode was transited by the severity of the strain concentration from the damage accumulation mode to the plastic deformation mode.

中文翻译：

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等原子 CrMnFeCoNi 高熵合金疲劳裂纹扩展的缺口形状依赖性

使用三种不同的微应力集中源对等原子 CrMnFeCoNi 高熵合金进行了疲劳试验。进行了使用试样表面复制品的疲劳裂纹行为分析、断裂表面的断口分析、疲劳裂纹形状分析和断裂表面下的应变分析。发现疲劳裂纹扩展模式通过应变集中的严重程度从损伤累积模式转变为塑性变形模式。