NSF-Europe: The Mechanisms of Grain Refinement with Severe Plastic Deformation Leading to Nanoscale Microstructures

这是意大利安科纳大学和加州大学圣地亚哥分校合作研究项目的拨款。该研究的目的是通过剧烈的塑性变形产生非常精细的纳米级晶粒尺寸。安科纳大学从国家材料科学研究所（INFM）获得了“超细晶粒铝合金的物理方面”的资助，这项NSF资助是一种机制，通过允许资金补充INFM研究，从而大大加强合作。INFM研究的一个主要目标是使用等通道角（ECA）挤压铝合金作为生产纳米级晶粒尺寸铝合金的手段。美国团队的努力是为了理解严重的塑性变形导致细化晶粒尺寸的具体机制。这项研究有望减轻在寻求生产具有商业价值的极细晶粒合金时所涉及的经验主义。加州大学圣地亚哥分校的团队将同时使用加州大学圣地亚哥分校和安科纳大学的机械设备。研究生、博士后和教师将长期（3个月至1年）在这些机构之间进行交流。该合作项目在范围上是非常互补的，并将通过利用国际专业知识来加强研究。本项目由美国国家科学基金会多学科活动办公室、材料研究部（金属研究）和国际办公室（西欧）共同资助，作为美国国家科学基金会与欧洲材料研究合作项目（NSF 02-135）。该项目正在与意大利安科纳的安科纳大学合作进行。

This is a grant for a collaborative research program between the University of Ancona, Ancona, Italy and the University of California at San Diego. The objective of the study is to produce very refined grain size to the nanoscale through severe plastic deformation. The University of Ancona has a grant from the Istituto Nazionale per la Fisica della Materia (INFM) for "Physical Aspects of Ultrafine Grained Aluminum Alloys," and this NSF grant is a mechanism to substantially enhance collaboration by permitting funding that is complementary to the INFM study. A major goal of the INFM study is to use equal channel angular (ECA) pressing of aluminum alloys as a means to produce nanoscale grain size aluminum alloys. The effort by the US team is directed towards understanding the specific mechanisms by which the severe plastic deformation leads to a refined grain size. The study is expected to alleviate the empiricism involved in the quest to produce very fine-grained alloys of commercial value. The UCSD group will utilize both the mechanical facilities at UCSD and the University of Ancona. Graduate students, postdoctoral scholars and faculty will participate in exchanges on long-term basis (three months to one year) between these institutions. The collaborative program is very complementary in scope, and will give an opportunity to enhance the research by taking advantage of the international expertise.This NSF project is co-funded by the Office of Multidisciplinary Activities, the Division of Materials Research (Metals Research) and International Office (Western Europe) as a Cooperative Activity in Materials Research between the NSF and Europe (NSF 02-135). This project is being carried out in collaboration with University of Ancona, Ancona, Italy.