|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Interface-driven Phenomena in Solids: Thermodynamics, Kinetics and Chemistry
||Exploring the Causes and Effects of Fast Grain Boundary Motion
||Elizabeth Holm, Brian DeCost, Jonathan Humberson, Taichong Ma, Philip Goins
|On-Site Speaker (Planned)
While materials scientists generally assume that quenching to room temperature stabilizes metallic grain structures, there are numerous counterexamples, most involving nanocrystalline structures. These observations raise two questions: How do grain boundaries move at low temperatures? What are the microstructural outcomes of this motion? In this talk, we will examine a suite of methods that help to answer these questions. Atomic models suggest mechanisms for fast, cold boundary motion, including non-thermally-activated facet motion in certain high population boundaries. These results can be incorporated into Material Point Monte Carlo simulations to track normal and abnormal grain growth in systems containing fast boundaries. The long-range structure of the grain network can then be characterized using graph kernel metrics in order to predict where critical features, such as abnormal grain nuclei, will form. By incorporating information from several length scales, these methods provide insight into the average and the outlier features of nanocrystalline microstructures.
||Planned: A print-only volume