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Investigation on the Phase Relationship and Solidification Processes of Mg-rich Mg-Mn-Y Alloys
Journal of Phase Equilibria and Diffusion ( IF 1.4 ) Pub Date : 2021-07-28 , DOI: 10.1007/s11669-021-00908-7
Tao Chen 1, 2 , Liling Mo 1, 2 , Yuan Yuan 1, 2 , Jiawei Liu 1, 2 , Jun Wang 1, 2 , Bin Jiang 1, 2 , Fusheng Pan 1, 2 , Dajian Li 3
Affiliation  

Information of solidification processes, liquidus temperatures, and phase relationship of the Mg-Mn-Y system in the Mg-rich corner was systematically studied using differential scanning calorimetry (DSC) measurement, x-ray diffraction (XRD) analysis and scanning electron microscope (SEM) analysis. One single-phase region (Hcp), two two-phase-equilibrium regions (Hcp + Cbcc & Hcp + Mg24Y5), and one three-phase-equilibrium region (Hcp + Cbcc + Mg24Y5) were identified in the Mg-rich corner at 550 °C in this work. No ternary phase was observed within the currently studying composition range. Corresponding calculations using the current available thermodynamic description of the Mg-Mn-Y system for the comparison with experimental results were performed. The experimental and calculation results show certain deviations in the phase transition temperatures and the tie-lines of the equilibrium phase regions. The differences are attributed to the extreme low concertation of alloying elements alloyed in Mg in this work, where few studies were performed in literature and nevertheless included in the previous assessment work. Therefore, the current results could provide an essential basis for the further study and revision of the thermodynamic description of the Mg-Mn-Y system and the design/development of new alloy and process of Mg-Mn-Y based alloys.



中文翻译:

富镁Mg-Mn-Y合金相关系及凝固过程研究

使用差示扫描量热法 (DSC) 测量、X 射线衍射 (XRD) 分析和扫描电子显微镜,系统地研究了富镁角中 Mg-Mn-Y 体系的凝固过程信息、液相线温度和相关系。 SEM) 分析。一个单相区(Hcp),两个两相平衡区(Hcp + Cbcc & Hc​​p + Mg 24 Y 5),和一个三相平衡区(Hcp + Cbcc + Mg 24 Y 5) 在这项工作中在 550 °C 的富镁角中被识别出来。在当前研究的组成范围内没有观察到三元相。使用当前可用的 Mg-Mn-Y 系统热力学描述进行相应计算,以便与实验结果进行比较。实验和计算结果表明相变温度和平衡相区域的连接线存在一定的偏差。这种差异归因于这项工作中镁合金元素的极低协调性,在文献中进行的研究很少,但仍包含在先前的评估工作中。所以,

更新日期:2021-07-29
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