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[交流] 【其他】学术讲座：Mechanical Testing of Metals and Ceramics at Elevated Temperat

学术讲座题目/Title：Mechanical Testing of Metals and Ceramics at Elevated Temperatures
报告人/Speaker：John W Holmes, Ph.D.
报告人工作单位/Affiliation：Visiting Professor, RISØ National Laboratory,
Technical University of Denmark, Materials Research Department, Denmark.
日期/Date：2009年5月22日，May 22 (Friday), 2009
时间/Time： 10:00 ～ 11:30 AM
联系人/Contact：冯强教授，qfeng@skl.ustb.edu.cn, 13811855486 (魏文娟)
报告地点/Location：北京科技大学主楼 353,  353 Main Building, USTB

         报告摘要/Abstract
Mechanical Testing of Metals and Ceramics at Elevated Temperatures
Materials such as Ni-base superalloys, Ti-alloys and ceramics are utilized in many elevated temperature structural applications.  Because of the cost and time associated with full scale testing, extensive coupon testing is commonly performed to provide input for structural design models and for verification of results from models used to predict structural response and reliability. Mechanical testing is also used for material development, for example to judge the effectiveness of a new coating for gas turbine blades or the effect of changes in alloy chemistry on life of a gas turbine blade or combustor.  The testing of materials at elevated temperatures requires the utilization of specialized equipment and test approaches. For example, Ni-base superalloys used for gas turbine blades undergo combined fatigue and creep in an oxidizing environment at temperatures as high as 1100 oC. Ceramics used for heat exchangers or for thermal protection systems can require coupon testing at temperatures well above 1200 oC. The presentation discusses various approaches used for elevated temperature mechanical testing of metals and ceramics and the importance of accurate mechanical testing in the design of various components including gas turbine blades, thermal protection systems and heat exchangers.

作者简介/Speaker’s biography
Dr.John W Holmes is a visiting professor in the Materials Research Department at RISØ National Laboratory for Sustainable Energy, Technical University of Denmark, DK 4000 Roskilde, Denmark. He graduated with a B.S. from the Pennsylvania State University in 1981, and a Ph.D. from MIT in 1986. Prior to joining Risø, Dr. Holmes had twenty years of research and teaching experience as a Professor at several major universities (University of Michigan and Georgia Institute of Technology). He has extensive experience in the areas of mechanical design, fracture mechanics, fatigue and life prediction of composite and metallic materials used for gas turbine, space shuttle, wind turbine and aircraft components. Dr. Holmes has received the GE Engineering Award, the ASM Henry Marion Howe Medal, the University of Michigan Research Excellence Award, an NSF-NYI Award and the Pi Tau Sigma Professor of the Term. He was the Associate Editor of International Journal of Fatigue.

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