Energy Materials 2017: Materials for Coal-Based Power: Session III
Sponsored by: Chinese Society for Metals
Program Organizers: Jeffrey Hawk, U.S. Department of Energy, National Energy Technology Laboratory; Zhengdong Liu, China Iron & Steel Research Institute Group; Sebastien Dryepondt, Oak Ridge National Lab

Wednesday 2:00 PM
March 1, 2017
Room: 12
Location: San Diego Convention Ctr

Session Chair: Kyle Rozman, National Energy Technology Laboratory; Richard Oleksak, National Energy Technology Laboratory

2:00 PM  Invited
Developing a Crystal Plasticity Model for Nickel Based Turbine Alloys Based on the Discrete Element Method: Jamie Kruzic1; Agnieszka Truszkowska2; Qin Yu2; Alex Greaney3; Matthew Evans2; 1UNSW Australia; 2Oregon State University; 3University of California, Riverside
    Material failures in demanding turbine applications often occur due to plastic and/or creep deformation leading to the emergence of strain localization, microvoids, and cracks at heterogeneities in the material microstructure. While many traditional deformation modeling approaches have difficulty capturing these emergent phenomena, the discrete element method (DEM) has proven very effective for the simulation of granular materials where heterogeneities are inherent to the microstructure. The DEM framework has the advantage that it naturally captures the heterogeneity and geometric frustration inherent to deformation processes. While DEM has been adapted successfully for modeling the fracture of brittle solids, to date it has not been used for simulating metal deformation. Here we present our progress in reformulating DEM to model the key elastic, plastic, and visco-plastic deformation characteristics of nickel-based superalloys to create an entirely new crystal plasticity modeling methodology well-suited for the incorporation of heterogeneities and simulation of emergent failure mechanisms.