Processing of Functionally Graded Nanocrystalline Alloys

该项目涉及先进材料加工领域的研究和教育元素，具体目标是创建一类新材料：功能梯度纳米晶金属（FGNMs）。 在智力方面的优点，该计划解决了新的加工科学问题，出现在结合两个以前独立的subfieldsnanocrystalline金属和功能梯度材料。采用水溶液电沉积制备纳米晶合金，并通过改变外加电流波形原位诱导梯度结构。 基本的加工科学中心周围的成分，结构和性能之间的不匹配的梯度纳米晶结构的相邻层，以及加工变量可以定制来控制这些不匹配的方式;残余应力和界面结构专门研究作为这样的不匹配的函数。 该研究的结构是这样的，处理问题的复杂性顺序解决，首先为个人沉积层，然后双层，最后复杂的多层梯度结构。除了培养研究生和本科生在材料加工科学的新领域，更广泛的影响，该项目中心的研究和教学的整合。 这些活动利用PI每年春季参与“先进材料加工”课程的教学。 参加该课程的本科生参加一个独特的项目，使他们参与研究活动，并以书面报告将研究与课程的使命联系起来。 这一机制也有助于将纳米晶金属加工的新讲座引入课程。

This project involves both research and educational elements in the area of advanced materials processing, with the specific goal of creating a new class of materials: functionally graded nanocrystalline metals (FGNMs). In terms of intellectual merits, the program addresses new processing science issues that arise in combining two previously separate subfieldsnanocrystalline metals and functionally graded materials. Nanocrystalline alloys are prepared using aqueous electrodeposition, and graded structures induced through in-situ changes to the applied current waveform. The fundamental processing science centers around the mismatch of composition, structure, and properties between the adjacent layers in a graded nanocrystalline structure, and the way in which processing variables can be tailored to control these mismatches; residual stresses and interface structure are specifically studied as a function of such mismatches. The research is structured in such a way that processing questions are addressed in order of complexity, first for individual deposited layers, then bi-layers, and finally complex multi-layer gradient structures.In addition to training of graduate and undergraduate students in new areas of materials processing science, the broader impacts of the project center on the integration of research and teaching. These activities take advantage of the PI's teaching involvement with a course on Advanced Materials Processing" each spring. Undergraduates enrolled in the course participate in a unique project that engages them in the research activity, and culminates with a written report that ties the research to the mission of the course. This mechanism also facilitates the introduction of new lectures on nanocrystalline metals processing into the course.