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Accelerated discovery and development of complex, concentrated alloys for structural applications

题目/Title:Accelerated discovery and development of complex, concentrated alloys for structural applications

报告人/SpeakerDr. Michael S. Titus, Assistant Professor

报告人工作单位/AffiliationDepartment of Materials Engineering,

Purdue University (普渡大学)

日期/Date2018514(星期一)May 14 (Monday), 2018

时间/Time2:30 - 3:0PM

联系人/Contact冯强 教授(邹敏zoumin_1200@163.com

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

报告摘要/Abstract

      Complex, concentrated alloys (CCAs) represent the idea that composition space is extremely vast and that compositions can lie outside of traditional "based" alloys such as Ni-based, Ti-based, etc. For example, a CCA would include an alloy composition of 20Mo-20Nb-15W-15Ta-15Ti-15Cr (at.%). New alloys are waiting to be discovered in this vast, unexplored composition that exists between traditional alloys. However, rapidly exploring this space computationally or experimentally is difficult due to the multi-component nature of these alloys. In this talk, I will present recent results on our efforts to rapidly explore this composition space using thermodynamic phase equilibria calculations, first-principles ground state energy calculations, parameter-free dislocation-based strength models, and thermodynamic descriptions of oxidation. Strategies for alloy design of the next generation of high performance structural alloys will be discussed.

作者简介/Speaker’s short biography

 Michael joined the School of Materials Engineering at Purdue University as an Assistant Professor in December 2016. Michael completed his B.S. in Engineering (The Ohio State University) in 2010 and Ph.D. in Materials (University of California Santa Barbara) in 2015. From 2015 to 2016 he was an Alexander von Humboldt Postdoctoral Fellow at the Max Planck Institute for Iron Research in Dusseldorf, Germany. Michael has co-authored 15 peer-reviewed journal articles and contributed more than 15 presentations at conferences since 2012. Michael’s current research interests include understanding complex deformation mechanisms in structural alloys at elevated temperatures, quantification of defect structure and chemistry through advanced electron microscopy and first-principles calculations, and the accelerated discovery and development of structural alloys through an integrated, high-throughput experimental, thermodynamic modeling, and first-principles calculations approach.