Seminar: Quantifying the response of polycrystals using high energy synchrotron x-ray experiments

Abstract

High energy x-ray characterization methods hold great potential for gaining insight into the behavior of materials and providing comparison datasets for the validation and development of mesoscale modeling tools.  A suite of techniques have been developed by the x-ray community for characterizing the 3D structure and micromechanical state of polycrystalline materials; however, combining these techniques with in situ mechanical testing under well characterized and controlled boundary conditions has been challenging due to experimental design requirements.  In this presentation, we describe advanced in situ loading environments that have been developed for communal use at the Advanced Photon Source and the Cornell High Energy Synchrotron Source.  Example 3D datasets that have been collected using this hardware and their application for materials modeling efforts will be discussed.

About the Speaker

Dr. Paul A. Shade is a materials research engineer for the Materials and Manufacturing Directorate of the U.S. Air Force Research Laboratory.  His research involves the development and application of novel experimental techniques to elucidate linkages between micro- and macro-scale behaviors in structural materials, including activity in the following topic areas: materials characterization using electron, ion, and x-ray microscopy; elastic and plastic deformation of metals; micro- and macro-scale thermo-mechanical testing; micro-machining; and experimental validation of materials models.  Particular emphasis has been placed on in situ thermo-mechanical testing in order to link with corresponding modeling efforts, where a large portion of Dr. Shade’s time over the last five years has been dedicated to integrating thermo-mechanical testing with high energy synchrotron x-ray characterization methods at both the Advanced Photon Source (Argonne National Lab) and the Cornell High Energy Synchrotron Source (Cornell University).  He received a Ph.D. in Materials Science and Engineering from Ohio State University in 2008.

Hosted by Professor Soheil Soghrati