Abstract Multi-principal elemental alloys, referred to as high- or medium-entropy alloys, are a new class of materials with properties that can be predicted according to their compositional combinations. CrFeCoNi alloys are considered as a potential material for high-temperature application. In this work, we investigate the structural and mechanical properties of 3D-printed CrFeCoNi alloys produced by powder bed fusion. The porosity, microhardness and mechanical properties of the printed parts were studied. The samples demonstrate mechanical properties that are better than those previously reported. In the temperature range from −150 °C to 300 °C, the yield strength of printed samples is twice as high as that of traditional manufacturing techniques. Annealing at 750 °C leads to formation of a sigma phase and changes in mechanical properties. This research estimates the potential application of CrFeCoNi medium-entropy alloys in the field of additive manufacturing.

中文翻译：

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粉末床熔合工艺参数对CrFeCoNi中熵合金组织和力学性能的影响

摘要 多基元合金，简称高熵或中熵合金，是一类新的材料，其性能可以根据其成分组合进行预测。CrFeCoNi 合金被认为是高温应用的潜在材料。在这项工作中，我们研究了通过粉末床融合生产的 3D 打印 CrFeCoNi 合金的结构和机械性能。研究了打印部件的孔隙率、显微硬度和机械性能。样品显示出比以前报道的更好的机械性能。在-150°C至300°C的温度范围内，打印样品的屈服强度是传统制造技术的两倍。在 750 °C 下退火会导致形成 σ 相并改变机械性能。