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MS&E Seminar Series: Dr. Michael Titus

February 17 @ 4:00 PM 5:00 PM

Professor Michael S. Titus
Purdue University
Host: Jason Kawasaki (MS&E)

Accelerated Design of High Temperature Structural Alloys

Abstract
For decades, structural alloy design has been guided by relatively fine composition adjustments in alloys based upon one or two principal elements (e.g. Fe, Ni, Cu). While significant progress has been made in designing structural alloys to operate in extreme environments, dramatic advances in properties has not been for many decades, based on properties alone. The discovery of Complex, Concentrated Alloys (CCAs), which comprise four or more principal elements, ignores past precedent of single-principal element alloys and offers the potential for radically new alloy systems with unique materials properties. Until recently computational and experimental tools developed for conventional alloys were inadequate for these emerging CCAs, but the advent of CCAs is coincident with more accurate computational tools, less costly experimental techniques, and data science tools capable of integrating information from disparate sources for materials optimization. This talk will focus on the recent integration between thermodynamic calculations, first-principles modeling, machine learning, and experimental validation of mechanical properties and oxidation resistance in refractory complex, concentrated alloys (RCCAs). We will present a new machine learning for accelerated materials discovery (ML-AMD) framework that utilizes multi-fidelity and multi-cost experiments with physics-based modeling. New semi-high-throughput methods for characterizing hardness and oxidation resistance will be presented, and methods for implementing high-throughput simulations into the ML-AMD framework will be expounded. Promising alloys will be identified, and strategies for improving the oxidation resistance of RCCAs will be discussed.

Biography
Prof. Titus joined the School of Materials Engineering at Purdue University as an Assistant Professor in December 2016. He completed his B.S. in Engineering Physics (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. Prof. Titus’ current research interests include accelerated design of structural alloys, exploiting solute interactions with crystalline defects for increased strength, and design of novel martensitic materials. He has been awarded the TMS SMD Young Leaders Professional Development Award (2018), NSF CAREER Award (2018), TMS Young Leaders International Scholar – JIM (2020), and most recently the ASM Bradley Stoughton Award for Young Teachers (2021).