The rapid solidification of AL-Ce alloys and FeCrMnNiCo high entropy alloy

AL-Ce合金和FeCrMnNiCo高熵合金的快速凝固

• 批准号: 530555-2018
• 负责人: Henein, Hani
• 金额: $ 5.05万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=697974
• 关键词: rapid; solidification; AL; Ce; alloys

Solidification of alloys is a complex phenomenon arising in many modern experimental techniques and industrial technologies related to casting and surfaces processing. The variation of different conditions of solidification (such as undercooling or cooling rate) gives a possibility to control the morphology and size of crystal structure, which substantially influence physical and chemical properties of alloys. In particular, deep undercooling of alloys below equilibrium liquidus, and eutectics results in rapid solidification and yields materials with improved mechanical, magnetic and electrical properties. The proposed 4 year project is a collaboration between Equispheres and the Univ. of Alberta. We will generate powder samples using Impulse Atomization (IA) - a single fluid rapid solidification technique. In Years 1 to 4 of this project, Al-Ce alloys will be generated. The latter is expected to be supersaturated in the alpha matrix due to undercooling. The solidified samples will be characterized using SEM, X-Ray diffraction, differential scanning calorimetry and microhardness. In Years 3 and 4, we will also be studying the rapid solidification of a high Entropy Alloy (HEA) FeCrMnNiCo. In addition, state of the art characterization such as 3D-micro and nano-tomography and Neutron Diffraction will be carried out. The characterization effort will lead to an understanding of the quantification of undercooling temperatures. These results will provide a basis for understanding the solidification structure resulting from solidification processes such as 3D printing and high pressure die casting where cooling rates and heat fluxes are similar to IA. The proposed alloy systems are important for automotive and aerospace applications where Canada plays a major role in production and manufacturing. Two graduate students will be trained in Canada.

合金的凝固是一种复杂的现象，出现在许多现代实验技术和工业技术与铸造和表面处理。不同的凝固条件（如过冷度或冷却速率）的变化提供了控制晶体结构的形态和尺寸的可能性，这实质上影响合金的物理和化学性能。特别地，低于平衡液相线的合金的深过冷和共晶导致快速凝固并产生具有改进的机械、磁性和电性能的材料。 拟议的4年项目是Equispheres和阿尔伯塔大学之间的合作。我们将使用脉冲雾化（IA）-一种单流体快速凝固技术生成粉末样品。在该项目的第1年至第4年，将生产铝铈合金。由于过冷，预计后者在α矩阵中过饱和。固化后的样品将使用SEM、X射线衍射、差示扫描量热法和显微硬度进行表征。 在第3年和第4年，我们还将研究高熵合金（HEA）FeCrMnNiCo的快速凝固。 此外，将进行最先进的表征，如3D微米和纳米层析成像和中子衍射。 表征工作将有助于了解过冷温度的量化。 这些结果将为理解3D打印和高压压铸等凝固过程产生的凝固结构提供基础，其中冷却速率和热通量与IA相似。拟议的合金系统对于汽车和航空航天应用非常重要，加拿大在这些应用中的生产和制造中发挥着重要作用。两名研究生将在加拿大接受培训。