Abstract:

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 metastable states as a strength to design new alloys dynamically, out-of-equilibrium, through two examples: leveraging local ordering in undercooled metallic liquids to stimulate crystal nucleation, and leveraging liquid-liquid phase separation. Emphasis will be placed on solidification mechanisms, and 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 and nuclear environments. She received her NSF CAREER award as well as the ACS New investigator award in 2023, the TMS Early Career Faculty Fellow in 2025, and is the author of over 45 peer-reviewed articles.