The Fall 2023 MatSE 590 for graduate students consists of an exciting and jam-packed schedule. MATSE 590 is a colloquium (1-3 credits) consist of a series of individual lectures by faculty, students, or outside speakers.
Graduate students will receive a weekly email with information via @psu.edu email. Graduate students are required to attend all 590 Seminars. If you have any questions, please email GradOffice@matse.psu.edu.
Graduate Student Convocation
Program overview presented by Prof. Darren Pagan
CAPS (Counseling & Psychological Services)
September 28, 2023 - "The Mechanisms Governing Grain Boundary Migration in Polycrystals"
Amanda Krause, Assistant Professor of Materials Science and Engineering, Carnegie Mellon University
Abstract
Curvature is the common driving force for grain boundary motion in all polycrystals. However, models and simulations derived from curvature-based motion cannot predict irregular, albeit commonly observed, grain growth behavior. To build better predictive models, we need to employ new tools to understand what governs grain growth. First, I will demonstrate how high energy x-ray diffraction microscopy (HEDM) can be used to observe grain growth in real 3D polycrystalline systems. In a grain growth study employing HEDM of strontium titanate, we find that curvature is a poor predictor of grain boundary migration. Instead, anisotropic grain boundary properties are hypothesized to override the contribution of curvature. Second, I will demonstrate how grain boundary energy anisotropy governs abnormal grain growth behavior in alumina and strontium titanate through controlled studies. These observations can help us understand how to design microstructures and build better predictive grain growth models.
Biographical Information
Dr. Amanda R. Krause is an Assistant Professor in the Materials Science and Engineering Department at Carnegie Mellon University. She received her B.S. and M.S. in Materials Science and Engineering from Virginia Tech, and her Ph.D. in Materials Science from Brown University. Before joining Carnegie Mellon University in 2022, she was an Assistant Professor at University of Florida (2019-2022) and a post-doctoral research associate at Lehigh University. Her research focus is engineering grain boundaries and microstructures for improving the mechanical performance and degradation response of ceramics used in extreme environments. She is a recipient of the NSF CAREER award (2022) and the Wimmer Faculty Fellowship (2023) from CMU’s Eberly Center for Teaching Excellence & Educational Innovation.
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