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Winter Seminar: Wednesday, March 7, 2012

Wednesday, March 7, 2012
Speaker: Panthea Sepehrban
Topic: Computational Modeling for Tomorrow's Technologies
Computational materials modeling is one of the fastest growing areas within the field of materials science. It has been developed with the goal of pushing theories and experiments beyond the limits of manageable mathematics and practicable experiments. This talk addresses the role of computational modeling in design of new materials through tailoring structural properties at various length scales. To elaborate the subject, a recently developed computational
technique for microstructural simulation is described. This model has been developed to simulate microstructural evolution during thermomechanical processing of precipitate hardenable alloys. It specifically aims to enhance fabrication of aluminum sheets with advanced properties that are required in light energy-efficient vehicle. The simulation algorithm is generated based on a Monte Carlo technique. At each stage of the process, microstructural properties are simulated on the basis of a competition between recovery and recrystallization for reduction of system’s
energy. To obtain reliable results, the effects of deformation-induced and pre-existing inhomogeneities, precipitates, and grain boundary pinning on the competitive recoveryrecrystallization process are included in the simulation algorithm. The developed technique is implemented to predict the microstructural evolution during processing of fine grained Al-Mg-Si sheets. The good quantitative agreement found between the model predictions and the results from the experimental investigations validates the modeling approach.

Biography: Dr. Panthea Sepehrband earned her B.Sc. and M.Sc. in Materials Science and Engineering from The University of Tehran, and Sharif University of Technology, respectively. She received her PhD in Mechanical Engineering from The University of Waterloo in 2010, and followed her research as a postdoctoral fellow at the same university. Her research is mainly focused on development of new generation of materials with specific properties through a synergy of multi-scale computational modeling and experimental analysis. She has authored 23 journal and conference publications in the area of materials modeling and microstructural development.