Watching Microstructure Evolve
Peter Voorhees will present "Watching Microstructure Evolve" at the next APS Colloquium Wednesday, June 5, at 3 p.m. in the APS 402 Auditorium.
With the advent of high-energy X-ray sources it is now possible to follow micro-structural evolution in three dimensions and as a function of time (4D). The ability to observe and quantify the evolution of a microstructure provides fundamentally new insights into this complex process.
This is especially true of microstructures that have complicated interfacial morphologies, such as two-phase mixtures that are produced following dendrititc solidification. Examples of the 4D results, and insights into the evolution of these two-phase mixtures during coarsening will be given. In addition, a multimodel X-ray imaging approach for systems in which the atomic density contrast is small and where accurate interfacial morphology is required will also be discussed.
Peter W. Voorhees is the Frank C. Engelhart Professor of Materials Science and Engineering and a professor in the Department of Engineering Sciences and Applied Mathematics at Northwestern and codirector of the Northwestern-Argonne Institute for Science and Engineering. He is a computational materials expert whose research employs theory, simulation, and experiment in areas ranging from nanotechnology and energy to four-dimensional microscopy.
Voorhees’s numerous awards include the National Science Foundation’s Presidential Young Investigator Award; ASM International’s Silver Medal in the Materials Science Division and J. Willard Gibbs Phase Equilibria Award; the Minerals, Metals, and Materials Society’s Bruce Chalmers Award; the McCormick School’s Award for Teaching Excellence; and listing as a “highly cited researcher” by the Institute for Scientific Information.