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Summer 2008 Seminar
Friday, August 1, at 3:30 p.m. room 184 Watts Hall
Bille Wang
PhD Candidate advised by Dr. Yunzhi Wang
Department of Materials Science and Engineering
The Ohio State University
Phase field modeling of microstructural evolution in Ni-base superalloys
Abstract
Computational simulations of microstructural evolution in Ni-base superalloys are a supplemental method of exploring material behavior. In particular, phase field modeling has become an important tool to develop fundamental understanding of microstructural evolution during phase transformations and plastic deformation. It has the ability to account for the full complexity of multi-phase, multi-variant and polycrystalline microstructures in advanced alloy systems. In contrast to the "mean-field" description offered by most of the existing models, a phase field model can provide complete microstructural information including morphology and spatial distribution of phases. Utilization of these features could be very useful in modern alloy and component development processes.
This work focuses on the steps to extend the phase field model into an engineering tool. Methods are shown for integrating the phase field model with experiments, databases and other simulation techniques. Mechanisms for bimodal particle size distributions are proposed, explored and modeled.
Bio
Billie received a S.B. in Mathematics, and a S.B. Materials Science and Engineering from the Massachusetts Institute of Technology in 2000 and a M.S. in Materials Science and Engineering from The Ohio State University in 2007. He is currently completing his Ph.D. in Materials Science and Engineering at The Ohio State University with Prof. Yunzhi Wang where his research has been focused on modeling Ni base superalloys with the phase field model to understand microstrutural evolution.
