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学术报告——美国伊利诺伊理工学院Sammy Tin教授
发布日期:2017-5-8 17:20:26 阅读次数:583

北京材料基因工程高精尖创新中心(筹)

和新金属材料国家重点实验室系列学术讲座

Beijing Advanced Innovation Center for Materials Genome Engineering

And SKL-AMM Seminar Series 2017

报告人/SpeakerSammy Tin, Professor

美国伊利诺伊理工学院教授,第十四届国际高温合金大会(Superalloys 2020)主席

美国矿物·金属·材料学会(TMS)高温合金委员会前任主席,Metall. Mater. Trans. A编委

报告人工作单位/AffiliationIllinois Institute of Technology

日期/Date 201759(星期二)/ May. 9 (Tuesday), 2017, 10:00 – 11:30 AM

           2017511(星期四)/ May. 11 (Thursday), 2017, 9:00 – 10:30 AM

联系人/Contact李龙飞 副教授  lilf@skl.ustb.edu.cn

报告地点/Location北京科技大学主楼 353 / 353 Main Building, USTB

报告摘要/Abstract


 

题目/Title 1Fundamental Alloy Design Strategies from Ni-Base Superalloys to High Entropy Alloys

时间/Time05/09  10:00–11:30 AM    地点/Location主楼353

A series of non-equiatomic Al-Co-Cr-Fe-Nb-Ni high-entropy alloys (HEAs), with varying levels of Co, Nb and Fe, were investigated in an effort to obtain microstructures similar to conventional Ni-base superalloys. Although elevated levels of Nb and Co were observed to increase the solvus temperature of the γʹ precipitates, they also promoted the formation of a Nb-rich intermetallic phase that formed during solidification and remained undissolved during homogenization. Lowering the content of Nb, Co or Fe prevented the formation of undesirable phases and resulted in finer γʹ precipitates while lowering the Co content alone resulted in a higher number and density of the γʹ precipitates. Various aging treatments were studied and allowed to control the size and distribution of the strengthening phase that formed during cooling. Results from the microstructural characterization and mechanical property assessments of these two-phase high-entropy alloys will be presented and the potential of the HEAs for replacing conventional Ni-base superalloys will be discussed.

题目/Title 2Design Approaches for Advanced Polycrystalline Ni-Base Superalloys

时间/Time05/11  9:00–10:30 AM    地点/Location主楼353

As one of the most important classes of high-temperature structural materials, Ni-base superalloys are critical to the continued development of high-performance turbine engines for propulsion and power generation. In order to accommodate the increases in engine operating temperatures required for improved performance and efficiency, higher concentrations of refractory alloying elements have been used to enhance the mechanical properties of Ni-base superalloys. However, many of these compositional modifications have also tended to result in the alloy being more difficult to manufacture into large-scale components using traditional approaches and techniques. The talk will discuss how advanced characterization techniques and ICME/MGI based modeling approaches have contributed to the mechanistic understanding of metal physics and the development of advanced polycrystalline Ni-base superalloys.

 


 

作者简介/Speaker’s short biography

Dr. Sammy Tin is a Professor of Materials Engineering in the Department of Aerospace, Materials and Mechanical Engineering at the Illinois Institute of Technology. Professor Tin’s research has focused on the composition – processing – microstructure - mechanical properties - performance relationships in polycrystalline and single crystal Ni-base superalloys. He has been the PI on numerous grants totaling ~$5 million focused on the development of a variety of Ni-base superalloy technologies. Prof. Tin is an internationally recognized expert in the field of superalloy creep, fatigue, oxidation and solidification. For many of these research activities, has collaborated extensively with industrial researchers at GE Aircraft Engines, GE Global Research Center, Rolls-Royce, Special Metals, Wyman Gordon, Firth-Rixson, PCC Airfoils, Caterpillar, Howmet and the Air Force Research Laboratory. Professor Tin also teaches an industrial short-course on Ni-base superalloy metallurgy.

Professor Tin serves on the Editorial Committee for Metallurgical and Materials Transactions A and was the recipient of the 2004 Rolls-Royce Mark Shipton Patent Award, the 2006 IOM3 Cook/Ablett Award and the 2007 ASM Marcus A Grossmann Award. He has also served as the Chair of the TMS High Temperature Alloys Committee and is currently Chair of the 2020 International Conference on Superalloys. Prof. Tin has five patent applications and authored over 100 manuscripts in referred journals and conference proceedings.

先进金属结构和功能材料科学与技术创新引智基地

材料基因工程创新引智基地(国家“111”计划)联合支持

 

友情链接
  北京科技大学新金属材料国家重点实验室