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首页> 外文期刊>ISIJ international >Comparative Study on Structural Variations during Containerless Solidification Processes of Fe-B and Fe-C Eutectic Alloys
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Comparative Study on Structural Variations during Containerless Solidification Processes of Fe-B and Fe-C Eutectic Alloys

机译：Fe-B和Fe-C低共熔合金无容器凝固过程中结构变化的比较研究

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摘要

A comparative study on structural variations during the solidification of Fe-C and Fe-B eutectic alloys was conducted by synchrotron x-ray diffraction under containerless cooling conditions using a conical nozzle levitation technique. It was revealed that a metastable phase composed of Fe_(23)B_(6) precipitated as the primary crystalline phase from the undercooled liquid Fe_(83)B_(17) alloy, whereas solidification of the Fe_(83)C_(17) alloy occurred via a normal phase transformation process according to the Fe-C phase diagram. In addition, decomposition of the metastable Fe_(23)B_(6) phase to the equilibrium phases shows a dependence on the cooling rate of the sample. By comparing the primary crystalline phase in the Fe_(83)C_(17) and Fe_(83)B_(17) alloys, we suggest that the formability of the metastable Cr_(23)C_(6)-type structure is closely related to the glass-forming ability of Fe-metalloid binary alloys.
机译：利用锥形喷嘴悬浮技术，在无容器冷却条件下，通过同步加速器X射线衍射对Fe-C和Fe-B共晶合金凝固过程中的结构变化进行了比较研究。结果表明，由过冷的液态Fe_（83）B_（17）合金析出了由Fe_（23）B_（6）组成的亚稳态相作为主晶相，而Fe_（83）C_（17）合金的凝固过程根据Fe-C相图，是通过正常的相变过程发生的。另外，亚稳的Fe_（23）B_（6）相分解为平衡相显示出对样品冷却速率的依赖性。通过比较Fe_（83）C_（17）和Fe_（83）B_（17）合金中的初生晶相，我们认为亚稳态Cr_（23）C_（6）型结构的可成形性与铁非金属二元合金的玻璃形成能力。

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