Development of Fe-Co-Cr-Mn-Ni-C high entropy cast iron (HE cast iron) available for casting in air atmosphere
Development of Fe-Co-Cr-Mn-Ni-C high entropy cast iron (HE cast iron) available for casting in air atmosphere
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DOI：
10.1016/j.matdes.2019.108172
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发表时间：
2019-12-15
影响因子：
8.4
通讯作者：
Yoshino, Katsumi
中科院分区：
文献类型：
--
作者：
Nagase, Takeshi;Kakeshita, Tomoyuki;Yoshino, Katsumi
在本文中，我们讨论了可在空气气氛中铸造的Fe-Co-Cr-Mn-Ni-C高熵合金（HEA）（以下称为HE铸铁合金）的开发。 FexCoCrMnNiCy HE铸铁合金通过添加碳来实现熔化和铸造过程中的还原气氛，随后针对碳化物和面心立方（FCC）相的液相线温度降低进行了热力学计算。分别在氩气流和空气气氛下在硅基坩埚中采用传统的高频熔化方法铸造铸锭。在 FexCoCrMnNi (x = 1、2 和 3) HEA 铸锭中观察到 FCC 相的形成。在成分为 FeCoCrMnNiC0.2、Fe2CoCrMnNiC0.4 和 Fe3CoCrMnNiC0.8 的 FexCoCrMnNiCy HE 铸铁合金锭中获得了 FCC 相和富 Cr 碳化物的复合材料。 FexCoCrMnNiCy HE 铸铁合金锭的组成相和凝固微观结构不依赖于加工气氛（Ar 流与空气气氛）。 (C) 2019 作者。由爱思唯尔有限公司出版
In this paper, we discuss the development of Fe-Co-Cr-Mn-Ni-C high-entropy alloys (HEAs), which can be cast in air atmosphere (hereafter called HE cast iron alloys). FexCoCrMnNiCy HE cast iron alloys were designed by the addition of carbon to realize the reduction atomosphere during melting and casting, with subsequent thermodynamic calculations for the decrease in the liquidus temperature focusing on the liquidus of carbides and the face-centered cubic (FCC) phase. The ingots were cast with conventional high-frequency melting methods in silica-based crucibles under Ar flow and air atmosphere, respectively. The formation of the FCC phase was observed in the ingots of FexCoCrMnNi (x = 1, 2, and 3) HEAs. Composites of the FCC phase and Cr-rich carbides were obtained in the ingots of FexCoCrMnNiCy HE cast iron alloys with compositions of FeCoCrMnNiC0.2, Fe2CoCrMnNiC0.4, and Fe3CoCrMnNiC0.8. The constituent phases and solidification microstructures of the FexCoCrMnNiCy HE cast iron alloy ingots were not dependent on the processing atmosphere (Ar flow versus air atmosphere). (C) 2019 The Author(s). Published by Elsevier Ltd.