GOALI: Manufacturing of Nanostructure-Enhanced Mn-Al-base Materials via Modulated Machining and Thermomechanical Consolidation for High-Performance Permanent Magnets

这个学术界与工业界联系的资助机会（GOALI）奖支持创新制造工艺的基础研究，以改进高性能永磁材料的制备。该工艺结合了使用基于机械加工的新工艺从MnAl基合金制备内部由超细晶粒结构组成的高纯度微粒。在随后的低温热机械固结的组成不变的固态相变将被用来获得致密的大块铁磁聚集体。将测量磁性和机械性能。热机械加工过程中的微观结构演变将通过X射线衍射和电子显微镜测量来确定。基于物理的数值模型将与实验相结合，以确定过程-结构-性能关系。该研究将为内部纳米结构合金颗粒的产生提供科学依据，以及为低温固结铁磁聚集体中纳米尺度晶粒尺寸的相变促进保留提供科学依据。该研究提供了新的加工和材料科学知识，以满足有效制造不含稀土金属的磁性材料的关键需求，这对机械功和电力之间的转换以及电力传输和分配技术至关重要。基于丰富成分的永磁材料的改进制造支持清洁风力发电和电动汽车技术的实施。此外，基础工艺方案适合于适应一系列合金系统。因此，该研究将提供的加工科学知识有望推动功能和结构材料的粉末颗粒制造领域的发展。该研究项目涉及来自匹兹堡大学和美国铝业的跨学科工业团队，为项目资源提供协同作用，确保研究的行业相关性，为学生提供多方面的研究生教育，并加速技术商业化。它还将对工程教育产生积极影响，促进工业从业者的终身学习，并扩大代表性不足的群体对研究的参与。

This Grant Opportunity for Academic Liaison with Industry (GOALI) award supports fundamental research on an innovative manufacturing process for the improved preparation of high performance permanent magnet materials. The process combines the preparation of high-purity micro-particulates that are internally composed of an ultrafine-grained structure from MnAl base alloys using a novel machining-based process. During subsequent low-temperature thermo-mechanical consolidation a composition-invariant solid-state phase transformation will be used to obtain dense bulk ferromagnetic aggregates. Magnetic and mechanical properties will be measured. Microstructure evolution during thermo-mechanical processing will be determined by x-ray diffraction and electron microscopy measurements. Physics based numerical models will be combined with experiments to determine the process-structure-property relationships. The research will provide the science underpinning the creation of the internally nanostructured alloy particulates, as well as for the phase transformation facilitated retention of the nano-scale grain size in the low-temperatue consolidated ferromagnetic aggregates. The research provides new processing and materials science knowledge to meet the critical need for the effective manufacture of rare-earth-metal-free magnetic materials, which are critical to technologies used in the conversion between mechanical work and electrical power, as well as in transmission and distribution of power. Improved manufacture of permanent magnet materials based on abundant ingredients supports the implementation of clean wind power and electric vehicle technologies. Additionally, the underlying process schema is amenable for adaptation to a range of alloy systems. Therefore, the processing science knowledge the research will deliver is expected to advance the field of powder-particulate based manufacturing of functional and structural material in general. The research project involves an interdisciplinary academia-industry team from the University of Pittsburgh and Alcoa, provides synergy for project resources, ensures the industry relevance of the research, enables multifaceted graduate education for students, and expedites technology commercialization. It will also positively impact engineering education, promote lifelong learning for industrial practitioners, and broaden participation of underrepresented groups in research.