Abstract Additive manufacturing (AM) is an emerging technology that has been widely used for fabricating components with highly complex shapes. In this work, C-containing FeCoCrNi high entropy alloy with full density was successfully fabricated using selective laser melting (SLM). The effects of processing parameters on the microstructures and mechanical properties were investigated, and the underlying mechanism was discussed. The density of HEA is dependent on the SLM processing parameter. The increase of the SLM scanning power or the decrease of the scanning speed leads to the increase of the density of HEA. The grain size reduced when the high scanning power or the low scanning speed was used. The C-containing HEAs with full density has a yield strength of 650 MPa, and an elongation of 13.5%.

中文翻译：

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激光选区熔化制备含碳FeCoCrNi高熵合金的组织和力学性能

摘要 增材制造（AM）是一种新兴技术，已被广泛用于制造具有高度复杂形状的部件。在这项工作中，使用选择性激光熔化（SLM）成功制造了全密度的含碳 FeCoCrNi 高熵合金。研究了加工参数对显微组织和力学性能的影响，并讨论了潜在的机制。HEA 的密度取决于 SLM 处理参数。SLM扫描功率的增加或扫描速度的降低导致HEA密度的增加。当使用高扫描功率或低扫描速度时，晶粒尺寸减小。全密度的含碳 HEA 屈服强度为 650 MPa，伸长率为 13.5%。