Faculty Awards for Women Scientists and Engineers

NSF女性科学家和工程师学院奖表彰获奖者在教学和学术方面的高质量记录，以及潜在的研究、学术专业和未来科学家和工程师的教育。此次获奖的法卡斯博士将进行的研究旨在了解有序金属间化合物合金的机械行为。有序金属间化合物合金为开发性能介于金属和陶瓷之间的材料提供了独特的机会。近年来的研究表明，这些合金的力学性能可以通过微合金化来控制。微合金化通过改变扩展的晶体缺陷，即位错和晶界的结构和迁移率来控制这些材料的性能。未来五年，这项研究将集中在新型有序金属间化合物合金扩展缺陷结构的理论研究上，重点是预测力学行为。要研究的合金将是立方和六方的，包括但不限于镍和钛铝化物。利用各种计算机模拟技术，研究这些材料中晶界和位错核的原子结构，以及位错和晶界之间的相互作用。目的是帮助理解这些合金在单晶和多晶状态下的力学行为，并能够提出改善其延展性的方法。在本研究的最后阶段，缺陷和缺陷交互作用模拟的结果将成为开发这些金属间化合物合金的力学行为模型和设计具有更好延展性的新金属间化合物的基础。

The NSF Faculty Awards for Women Scientists and Engineers recognizes the high quality of the awardee's record in teaching and scholarship, as well as potential research, the academic profession, and the education of future scientists and engineers. The research to be undertaken by Dr. Farkas with this award is aimed at understanding the mechanical behavior of ordered intermetallic alloys. Ordered intermetallic alloys offer a unique opportunity to develop materials with properties intermediate between metals and ceramics. In recent years it has been shown that the mechanical properties of these alloys can be controlled by microalloying. Microalloying controls the properties of these materials through modification of the structure and mobility of extended crystal defects, namely dislocations and grain boundaries. This research for the next five years will concentrate on theoretical studies of extended defect structure in novel ordered intermetallic alloys, with emphasis in predicting mechanical behavior. The alloys to be studied will be both cubic and hexagonal, including, but not limited to Ni and Ti Aluminides. Using various computer simulation techniques, the atomic structure of grain boundaries and dislocation cores in these materials and the interaction of dislocations and grain boundaries will be investigated. The goal is to contribute to the understanding of the mechanical behavior of these alloys in both single crystal and polycrystalline form and to be able to suggest ways to improve their ductility. In the last phase of this research, the results of the defect and defect interaction simulations will constitute the basis for the development of models for mechanical behavior of these intermetallic alloys and in the design of new intermetallics with improved ductility.