Characterization of stress has long been recognized as essential for the prediction of materials behavior. However, direct three-dimensional (3-D) measurements of sub-grain microscopic stress tensor distributions have not been available to guide theories of mesoscale dynamics. Here we report on advances in software and instrumentation that make it possible to determine 3-D stress tensor distributions in polycrystalline materials with a spatial resolution below the grain size of most materials. Based on the success of a prototype, a powerful 3-D x-ray crystal microscope is now being constructed to push stress measurements to gauge volumes less than 0.25 cubic microns. The UnicatII beamline 34-ID microscope will provide new information certain to challenge emerging models of mesoscale dynamics and to identify and quantify previously hidden mesoscopic processes.
|Number of pages||6|
|State||Published - 1 Dec 2000|
|Event||Heat Treating: Proceedings of the 20th Conference - St. Louis, MO, United States|
Duration: 9 Oct 2000 → 12 Oct 2000
|Conference||Heat Treating: Proceedings of the 20th Conference|
|City||St. Louis, MO|
|Period||9/10/00 → 12/10/00|