MSE Seminar Series: A Tale of Two Processes: Additive Manufacturing and Thermomechanical Processing of Metallic Alloys

Speaker

Amy J. Clarke
Distinguished Scientist, Los Alamos National Laboratory
Faculty Joint Appointment, Department of Metallurgical and Materials Engineering, Colorado School of Mines

Abstract

Understanding structure-processing-property-performance relationships of metallic alloys is critical to their manufacture and use in extreme environments. For example, refractory multi-principal element alloys (RMPEAs) are affording new opportunities for high temperature performance in aerospace, defense, and energy applications. Significant opportunity exists to not only employ emerging manufacturing technologies like additive manufacturing to make metallic alloys, but also conventional manufacturing processes like thermomechanical processing to tailor their microstructures. Here we highlight recent efforts to link materials processing to metallic alloy microstructural development, including the visualization of solidification dynamics under additive manufacturing conditions and aspects like dynamic recrystallization in RMPEAs produced by thermomechanical processing. Such studies will yield novel alloying, processing, and microstructural and property design strategies to achieve advanced manufacturing of metallic alloys and performance in extreme environments.

Biography

Amy J. Clarke is a Distinguished Scientist in the Sigma Manufacturing Sciences Division at Los Alamos National Laboratory and holds a faculty joint appointment with the Department of Metallurgical and Materials Engineering (MME) at the Colorado School of Mines (Mines). Previously, she was the John Henry Moore Distinguished Professor of Metallurgical and Materials Engineering in MME at Mines. Amy currently serves as Director of a multi-university, National Nuclear Security Agency (NNSA) Stewardship Science Academic Alliances Center of Excellence on Advanced Characterization of Metals under Extreme Environments. Her research focuses on physical metallurgy; making, measuring, and modeling metallic alloys during processing to realize advanced manufacturing; and processing-structure-properties-performance relationships in metals and alloys. Amy received her MS and PhD degrees from Mines and her BS degree at Michigan Technological University in Metallurgical and Materials Engineering. She serves on The Minerals, Metals & Materials Society (TMS) Foundation Board of Trustees, as an Editor for Metallurgical and Materials Transactions A, and has served on the TMS and Association for Iron & Steel Technology Boards of Directors. She is a past recipient of a Presidential Early Career Award for Scientists and Engineers (nominated by the U.S. Department of Energy (DOE) and NNSA Defense Programs), U.S. DOE Office of Science Early Career Research Program award, Office of Naval Research Young Investigator Program, and Mines Excellence in Research Award (Senior). She is also a TMS Brimacombe Medalist and Fellow of ASM International.