GOALI/Collaborative Research: Engineered Surface Microstructures by Machining

GOALI/合作研究：通过机械加工设计表面微结构

• 批准号: 0927410
• 负责人: M Ravi Shankar
• 金额: $ 15万
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2013-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0927410&HistoricalAwards=false
• 关键词: GOALI; Collaborative; Research; Engineered; Surface

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).The research objective of this Grant Opportunity for Academic Liaison with Industry (GOALI) Collaborative Research award is to develop capabilities for engineering surfaces with specific micro-scale and ultrafine grained structures, and enhanced mechanical properties, directly by machining. It brings together the complementary strengths of Purdue, the University of California Santa Barbara, University of Pittsburgh, M4 Sciences, Cummins and Seco Tools (Sweden) in a collaboration building on early observations that machining offers a controlled method of severe plastic deformation and that this severe plastic deformation can be exploited to effect microstructure refinement. The research approach will be based on modeling of the severe plastic deformation at different length scales, including microstructure and texture development arising from interactive effects of strain rate, strain and temperature in the deformation zone. The models will incorporate crystal plasticity. Model predictions will be compared with direct measurement of the deformation parameters made using advanced optical techniques, and characterization of microstructure by transmission electron microscopy, nano-indentation and electron back scatter diffraction. If successful, the broader impact of the results will be enhanced scientific understanding of severe plastic deformation and microstructure development in machining, and its practical utilization in the discrete products sector to engineer component surfaces with improved properties and performance. The results will be applicable also to a broad class of deformation processes and wear phenomena. Complementing the research is an education and training program that includes short-term student visits to industrial partners and exposure to international research participation; summer undergraduate research internships; and a short-course on deformation-microstructure phenomena for practitioners.

该奖项是根据2009年的《美国复苏与再投资法》（公法111-5）资助的。与工业联络（Goali）协作研究奖的这一赠款机会的研究目标是为具有特定的微型尺度和超级法规验证结构的工程表面开发能力，并通过加工直接加工。它汇集了普渡大学，加州圣塔芭芭拉分校，匹兹堡大学，M4科学，康明斯和Seco工具（瑞典）的互补优势，该协作建设了早期观察，即机械加工提供了一种严重的塑性变形的受控方法，并且这种严重的塑性变形可以利用对效果进行效果的效果，以实现效果良好。该研究方法将基于在不同长度尺度上的严重塑性变形的建模，包括微观结构和纹理发育是由变形区域中应变速率，应变和温度的交互作用产生的。这些模型将结合晶体可塑性。模型预测将与直接测量使用高级光学技术制成的变形参数进行比较，以及通过透射电子显微镜，纳米识别和电子背部散射衍射对微结构进行表征。如果成功，结果的广泛影响将增强对加工中严重的塑性变形和微观结构开发的科学理解，以及其在离散产品部门中的实际利用，以对具有改善的性质和性能的工程组件表面进行工程。结果也将适用于广泛的变形过程和磨损现象。补充这项研究的是一项教育和培训计划，其中包括对工业伙伴的短期访问和参加国际研究参与的访问；夏季本科研究实习；以及针对从业者的变形 - 微结构现象的短期。