U.S.-Australia Cooperative Research: The Grain Boundary Structure/Chemistry of FeAl

9513186贝克该奖项将资助达特茅斯学院塞耶工程学院的伊恩·贝克博士的旅行，使他能够与新南威尔士大学材料科学与工程学院的保罗·门罗博士开展合作研究。这项工作旨在进一步了解FeAl中晶界结构和化学成分之间的关系以及沿晶断裂的发生，FeAl是一种具有潜在商业价值的材料。塑性差和脆性断裂是金属间化合物的重要缺点。本研究的重点是双晶中的晶界。将研究边界特征和结构无序的影响，改变Fe和Al的比例，以期确定为什么一些GBs断裂，而另一些不断裂。还将考察三元合金化的影响，以确定某些合金元素抑制晶界断裂的原因。这项拟议的工作将使用场发射枪扫描透射电子显微镜FEG STEM，该显微镜由新南威尔士大学和悉尼大学联合运营。该项目将调查人员的互补研究兴趣与获得专门设备结合在一起。

9513186 Baker The award will support the travel of Dr. Ian Baker, Thayer School of Engineering at Dartmouth College, to enable him to conduct collaborative research with Dr. Paul Munroe of the School of Materials Science and Engineering at the University of New South Wales. The proposed work aims to further an understanding of the relationship between grain boundary structure and chemistry and the occurrence of intergranular fracture in FeAl, a material of some potential commercial importance. Poor ductility and brittle fracture are important drawbacks of intermetallic compounds. The focus of this study is on grain boundaries (GBs) in bicrystals. The effects of boundary character and constitutional disorder, changing the ration of Fe to Al, will be examined with a view to determining why some GBs fracture and others do not. The effect of ternary alloying additions will also be examined to determine why some alloying elements suppress grain boundary fracture. The work proposed will use a field emission gun scanning transmission electron microscope, FEG STEM, which is jointly operated by the University of New South Wales and the University of Sydney. The project brings together the complementary research interests of the investigators with access to specialized equipment.