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.
April 25 2024
12:00 AM ET
Materials Science and Engineering
Anisotropic Attack of YA1O3 Model Environmental Barrier Coatings by Molten CaO-MgO- Al2O3-SiO2 Deposits, presented by Amanda Velazquez Plaza
2327 Wean Hall
April 25 2024
10:30 AM ET
Materials Science and Engineering
Elucidation of the Effect of Chain Dispersity on Microstructure and Mechanical Properties of Brush Particle Assembled Materials, presented by Ayesha Abdullah
140 Roberts Hall
April 26 2024
10:00 AM ET
Materials Science and Engineering
First Principles Simulations of Hybrid Inorganic Interfaces, presented by Noa Marom, Carnegie Mellon University
Doherty Hall 2210
May 15 2024
2:00 PM - 3:00 PM ET
Bosch Spark Conference Room, Scott Hall