Join us on Wednesday, September 4th for a seminar from Marie Charpagne of The University of Illinois at Urbana-Champaign. Her talk, entitled “Designing Printable Alloys By Tailoring Local Liquid Ordering,” will occur at 3pm in Maryland Hall Room 110.
Abstract: Designing printable alloys by tailoring local liquid ordering
Additive manufacturing (AM) is revolutionizing how we synthesize, produce, and use metallic materials. However, out of hundreds of commercially available engineering alloys, only a handful are readily printable. This arises from the extreme heating and cooling rates associated with AM, which lead to microstructures that are far from thermodynamic equilibrium. In this talk, I will present how we can leverage rapid solidification as a strength to re-think how to design new alloys dynamically, out-of-equilibrium.
Virtually all AM alloy design strategies that exist today utilize solid-state transformations. Here, I will introduce a novel alloy design strategy that leverages local ordering in undercooled liquids to stimulate efficient crystal nucleation. Emphasis will be placed on the fundamental solidification mechanism, microstructure development as a function of alloy composition and processing conditions, and framing transformative design guidelines for the design of novel printable alloys.
Bio:
Marie A. Charpagne is an assistant professor in the Materials Science and Engineering Department at the University of Illinois at Urbana-Champaign. Marie graduated with a PhD in Materials Science from Mines ParisTech in 2017, focusing on thermo-mechanical processing. Before joining UIUC in Fall 2021, she was a postdoctoral researcher at the University of California in Santa Barbara, where she developed new techniques in correlative and 3D electron microscopy. Her research now leverages core concepts in physical metallurgy, rapid solidification and micro-mechanics, to design new alloys for additive manufacturing. She received her NSF CAREER award as well as the ACS New investigator award in 2023 and is the author of over 40 peer-reviewed articles.