Integrated Research and Educational Activities in Diffusion Bonding of Metal Alloys

金属合金扩散连接的综合研究和教育活动

• 批准号: 0907616
• 负责人: Matthew Cavalli
• 金额: $ 33.6万
• 依托单位: University of North Dakota Main Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-15 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0907616&HistoricalAwards=false
• 关键词: Integrated; Research; Educational; Activities; Diffusion

TECHNICAL: This project advances fundamental understanding of diffusion bonding in iron- and nickel-based alloys. Diffusion bonding could play a critical role in the development of the next generation of metal alloys used in power plants and turbines, as higher working temperatures will require careful control over metal alloy composition and microstructure. In this research results of experimental testing are integrated with the Ther-moCalc/DICTRA software packages and user-created MATLAB algorithms to create modeling tools capable of estimating the performance of diffusion-bonded joints. Increased demand for energy conversion efficiency means that components like heat exchangers and turbines must run hotter and last longer without a shutdown. A variety of nickel- and iron-based alloys can meet these demands using carefully controlled chemistry and processing. Fabrication and repair using these alloys demand development of robust joining methods that preserve properties in the region of the joint. Diffusion bonding is an excellent candidate for this purpose. The research employs a combination of microstructural analysis, mechanical testing, and numerical calculation to create tools that predict the properties of diffusion-bonded joints.NON-TECHNICAL: The educational structure of the program incorporates the current best practices of engineering education including hands-on activities, peer mentoring and practical applications of engineering theories. Undergraduate and graduate researchers collaborate in the research activities. The integrated research and educational objectives broaden access to engineering for students that might not have otherwise considered it while also improving the skills and expertise of those already enrolled. Educational activities including peer mentoring, collaborative high school/undergraduate design projects, a summer academy, and activities for underrepresented minorities. Native American students participate in educational activities as part of a larger program designed to attract and retain them in math, science and engineering. High school students that his-torically have not pursued engineering in college are targeted by a collaborative design project and summer academy. The program?s experimental tests and results will be integrated into at least four upper-division or graduate courses.

技术：该项目推进了对铁基和镍基合金扩散连接的基本理解。扩散连接在发电厂和涡轮机中使用的下一代金属合金的开发中可能发挥关键作用，因为更高的工作温度将需要仔细控制金属合金的成分和微观结构。在这项研究中，实验测试的结果与ThermoCalc/DICTRA软件包和用户创建的MATLAB算法相结合，以创建能够估计扩散连接接头性能的建模工具。对能源转换效率的需求增加意味着热交换器和涡轮机等组件必须在不停机的情况下运行更热和更长时间。各种镍基和铁基合金可以通过仔细控制化学和加工来满足这些要求。使用这些合金的制造和修复需要开发稳健的连接方法，以保持接头区域的性能。扩散焊接是一个很好的候选人为这一目的。该研究采用了微观结构分析，力学测试和数值计算相结合，以创建预测扩散连接接头性能的工具。非技术性：该计划的教育结构结合了当前工程教育的最佳实践，包括动手活动，同行指导和工程理论的实际应用。本科生和研究生研究人员在研究活动中合作。综合研究和教育目标扩大了可能没有考虑它的学生获得工程的机会，同时也提高了那些已经入学的学生的技能和专业知识。教育活动包括同伴指导、高中/本科生合作设计项目、暑期学院和为代表性不足的少数民族开展的活动。美国原住民学生参加教育活动，作为旨在吸引和留住他们在数学，科学和工程更大的计划的一部分。历史上没有在大学攻读工程的高中生是合作设计项目和暑期学院的目标。程序？的实验测试和结果将被整合到至少四个高年级或研究生课程。