Graduate Seminar Series
March 03, 2023
10:00 a.m. ET
7500 Wean Hall
March 03, 2023
10:00 a.m. ET
7500 Wean Hall
Nearly all structural and functional materials are polycrystalline systems; they are composed of crystalline grains that are internally joined at grain boundaries (GBs). Even minute amounts of dopants at GBs result in profound changes to GB dynamics, specifically grain growth during processing treatments or under high-temperature operating conditions. While GB solute segregation has been the subject of active research, most existing studies focus on the thermodynamics of GB segregation and the kinetic role (i.e., dynamic solute drag) remains unexplored. The challenge here is that GB solute drag depends on several properties, such as alloy thermodynamics (e.g., heat of mixing), and kinetic processes including GB solute diffusion and boundary migration; solute drag is a hypersurface. In this talk, we present physics-informed neural networks (PINNs) to investigate GB solute drag in regular solution metallic alloys. The PINN model not only predicts the solute drag hypersurface, but also honors the nonlinear governing equations describing GB segregation and solute transport. Representative PINN results are presented to reveal new insights about the roles of asymmetric GB segregation and solute-solute interactions in drag effects. In broad terms, our modeling approach provides avenues to detangle the thermodynamic and kinetic roles of GB segregation in grain coarsening of a wide range of metallic alloys.
July 8 2025
1:00 PM ET
Materials Science and Engineering
"Uncovering the Driving Force of Thermal-Activated Grain Boundary Migration in Polycrystals," presented by Zipeng Xu
Doherty A310
July 29 2025
11:00 AM ET
Materials Science and Engineering
Graduate Programs Information Session
Learn more about the master's and doctoral programs in materials science and engineering at CMU.
August 13-15 2025
Materials Science and Engineering
Workshop on Methods for Three-Dimensional Microstructure Studies
The workshop is intended for researchers at all levels and will combine presentations on 3D microstructure science as well as practical presentations on the tools and methods for reconstructing, analyzing and synthesizing.
Scott Hall 5201 (Bosch Sparks Conference Room)