Solidification sequence of CrMnFeCoCu dual-FCC multicomponent alloy
Solidification sequence of CrMnFeCoCu dual-FCC multicomponent alloy
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DOI：
10.1016/j.scriptamat.2023.115459
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发表时间：
2023
影响因子：
6
通讯作者：
R. Katsube;L.X. Luo;Keita Nakano;T. Narumi;H. Yasuda
中科院分区：
文献类型：
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作者：
R. Katsube;L.X. Luo;Keita Nakano;T. Narumi;H. Yasuda
由CrMnFeCoNi合金衍生的多元多相合金在结构材料领域中受到越来越多的关注。与传统合金相比，这种材料具有大的自由度，因此，它们的凝固顺序可能更复杂。在此，CrMnFeCoCu合金的凝固序列，其中在CrMnFeCoNi合金中的Ni被Cu取代，使用同步辐射X射线照相术和X射线衍射进行了研究。研究表明，采用传统的多相凝固方式，并不能简单地形成由面心立方（FCC）结构两相组成的组织。均匀的液相首先分裂成两个液相，并且它们各自固化成两个FCC固相。其中一个固相的结构也证实了从类立方晶系到面心立方晶系的转变。了解本研究中确定的液-液相分离和固相转变对于控制多组分和多相合金的微观结构是有用的。
Multicomponent and multi-phase alloys derived from the CrMnFeCoNi alloy are receiving increasing interest in the field of structural materials. Such materials have large degrees of freedom compared with conventional alloys, therefore, their solidification sequence can be more complex. Herein, the solidification sequence of the CrMnFeCoCu alloy, where Ni in the CrMnFeCoNi alloy is substituted with Cu, was investigated using synchrotron X-ray radiography and X-ray diffraction. This study demonstrated that the microstructure composed of two phases with face-centered-cubic (FCC) structures was not simply formed through the conventional multiphase solidification manner. The uniform liquid phase first splits into two liquid phases, and they individually solidify into the two FCC solid phases. The massive-like body-centered-cubic (BCC) to FCC transformation for one of the solid phases was also confirmed. Understanding the liquid-liquid phase separation and the solid-phase transformation identified in this study can be useful for controlling the microstructure of multicomponent and multi-phase alloys.