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Effect of Fe content upon the microstructures and mechanical properties of Fe_xCoNiCu high entropy alloys

机译：Fe含量对Fe_xCoNiCu高熵合金组织和力学性能的影响

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摘要

Four FexCoNiCu (x = 1.5, 2, 2.5 and, 3) high entropy alloys were fabricated by vacuum inductive melting method. The impact of the percentage of Fe on crystal structure transition, microstructure evolution and mechanical properties were studied. The results show that with the increase Fe content the crystal structure of the alloys gradually transformed from FCC to a mix of FCC and BCC phases. Cu segregation and precipitates containing high Fe content were also observed. The hardness was found to increase steadily from 304 HV to 672 HV due to the increase of fraction of BCC phase. In contrast, the tensile strength firstly increased from 392 MPa to 639 MPa, and then decreased to 576 MPa.
机译：通过真空感应熔化法制造了四种FexCoNiCu（x = 1.5、2、2.5和3）高熵合金。研究了铁含量对晶体结构转变，微观组织演变和力学性能的影响。结果表明，随着铁含量的增加，合金的晶体结构逐渐从FCC转变为FCC和BCC相的混合物。还观察到铜偏析和高铁含量的沉淀。发现由于BCC相的分数增加，硬度从304HV稳定地增加至672HV。相反，抗张强度首先从392 MPa增加到639 MPa，然后降低到576 MPa。

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