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Spring 2009 Seminar Series
Monday, June 1, at 3:30 p.m.
Room 264 MacQuigg Labs
Eric Payton
PhD Candidate advised by Dr. Michael Mills
Department of Materials Science and Engineering
The Ohio State University
Characterization and Modeling of Grain Coarsening in Powder Metallurgical Nickel-based Superalloys
Abstract
Accurate prediction of grain size as a function of processing conditions is highly sought after in many advanced alloy systems because specific grain sizes are required to achieve desired mechanical properties, including creep and fatigue behavior. In Ni-based superalloys for turbine disk applications, physics-based modeling of grain coarsening is needed to accelerate alloy and process development and to meet demands for higher engine operating temperatures. The variation of distributions and volume fractions of secondary phases with thermal exposure control grain growth behavior and hence control grain coarsening. Materials simulation and characterization techniques are being integrated and used simultaneously to understand the microstructural features that control grain coarsening and to develop physics-based predictive models.
Bio
Eric received a BS in Materials Science and Engineering from Virginia Tech in 2003 and his MS in Materials Science and Engineering from Ohio State in 2007. He has been studying microstructural evolution in Ni-based superalloys under the guidance of Professors Mike Mills and Yunzhi Wang since 2004. His research interests include materials characterization, microstructural evolution, and multi-scale materials modeling.
