Applied Computational Mathematics Division


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Modeling Polycrystalline Growth

James Warren
Materials Science and Engineering Laboratory, Metallurgy Division; and Center for Theoretical and Computational Materials Science

Tuesday, January 25, 2005 15:00-16:00,
NIST North (820), Room 145
Gaithersburg
Tuesday, January 25, 2005 13:00-14:00,
Room 4550
Boulder

Abstract: Phase field models have enjoyed a great deal of attention, due to their flexibility in capturing the essential thermodynamics and symmetry of physical phenomena, while simultaneously allowing for the simulation of extremely complex microstructure formation. Over the past 10 years, the ability to model solidification, grains, and stress (in addition to solid-solid transitions) has allowed us to begin to model some of the more technologically important processing techniques. The phase field approach starts from the solid foundation of thermodynamics, and includes only a modest amount of phenomenology, yet the predictive power of this approach is well demonstrated. This talk will examine the application of the phase field method to materials containing grain boundaries, and explore an unexpected puzzle in pattern formation.

Speaker Bio: After James Warren received his AB in Physics from Dartmouth College in 1987, he spent 5 years in Santa Barbara before being awarded a PhD in Physics. He then moved to the Metallurgy Division at NIST, where he has been ever since. During his 12 years at NIST he has worked primarily on problems involving pattern formation arising during phase transitions in materials systems. In 1994, with Drs. C. Carter, S. Glotzer, and A. Roosen, Dr. Warren co-founded the Center for Theoretical and Computational Materials Science (CTCMS), of which he is now Director. Dr. Warren is particularly proud to have been honored to receive the Champion H. Matthewson Award from the TMS, in 1999.

Presentation Slides: For a copy of the presentation slides, please contact the speaker (james.warren@nist.gov).

Contact: P. M. Ketcham

Note: Visitors from outside NIST must contact Robin Bickel; (301) 975-3668; at least 24 hours in advance.