ABSTRACT Mechanically alloyed high-entropy alloy (HEA) has taken considerable attention due to its ease of fabrication. Recent trend progresses towards the development of non-equiatomic HEAs to enhance the material properties compared to equiatomic alloys. Sintering behaviour of widely investigated equiatomic FeCoCrMnNi HEA has been reported. However, no report exists on the sintering kinetics of non-equiatomic HEA, when the concentration of a particular element is increased in the alloy powder. The present work attempts to study the isothermal and non-isothermal sintering behaviour of mechanically alloyed non-equiatomic Fe2CoCrMnNi HEA over a temperature range of 950–1100°C in an argon atmosphere. Activation energies for sintering and diffusivity parameters of Fe2CoCrMnNi HEA were calculated from dilatometric measurements through the sintering models. The result indicates the grain boundary diffusion as a dominating sintering mechanism for this alloy powder.

中文翻译：

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机械合金化非等原子Fe2CoCrMnNi高熵合金粉末的等温和非等温烧结特性

摘要 机械合金化高熵合金 (HEA) 由于其易于制造而备受关注。与等原子合金相比，最近的趋势是开发非等原子 HEAs 以提高材料性能。已经报道了广泛研究的等原子 FeCoCrMnNi HEA 的烧结行为。然而，当合金粉末中特定元素的浓度增加时，没有关于非等原子 HEA 的烧结动力学的报告。目前的工作试图研究机械合金化的非等原子 Fe2CoCrMnNi HEA 在 950-1100°C 的温度范围内在氩气气氛中的等温和非等温烧结行为。Fe2CoCrMnNi HEA 的烧结活化能和扩散参数是通过烧结模型通过膨胀测量计算得出的。结果表明晶界扩散是该合金粉末的主要烧结机制。