HOME

Left: Schematic of computational reconstruction with meshed sample plane, detector and projection geometry. Center: A sub-region of a reconstructed microstructure. Colors are coded to the local crystallographic orientations (J. Lind thesis, 2013). Right: Three dimensional reconstructed copper microstructure (R. Pokharel thesis 2013).
For information about Carnegie Mellon University, click here.
For information about the CMU Physics Department, click here.

HEDM Resources

More to come as time permits!

1. MIC files
   1. MIC file format information (PDF). Matlab© and/or Python codes to load and display these files will be added as time permits.
2. Software
   1. Hierarchical Smoothing of voxelized representations of interfaces such as grain boundaries, foams, etc. The algorithm was developed and implemented by Siddarth Maddali and is described his PhD thesis (see below) and in “Topology-faithful nonparametric estimation and tracking of bulk interface networks,” to appear in Computational Materials Science.
3. Theses
   1. D. Menasche Ph.D. Thesis (~ 170 MB) May, 2016). “Error Analysis of near-field High Energy Diffraction Microscopy.” Along with two application studies, this thesis contains two studies of nf-HEDM reconstruction accuracy and precision. These studies will be presented in a forthcoming article (D. B. Menasche, P. Shade, R. M. Suter, in preparation).
   2. S. Maddali Ph.D. Thesis (~ 31 MB) Jan, 2016), “Computational mining of meso-scale physics from high-energy X-ray data sets.” This contains first pass analysis of the annealing of an α-iron sample along with descriptions of analysis codes that are useful for such measurements: boundary smoothing and motion tracking and a new algorithm for extraction of boundary energies and mobilities from such data (S. Maddali, S. Ta’asan, and R. M. Suter, in preparation).
   3. J. Lind Ph.D. Thesis (~ 28 MB) Aug, 2013). “In-situ High-Energy Diffraction Microscopy Study of Zirconium Under Uniaxial Tensile Deformation.” This contains the stated study of zirconium as well as details of our signal extraction from raw diffraction images which is critical for reliable reconstructions. Extensions of the analysis of the zirconium data set are currently underway.
   4. C. M. Hefferan Ph.D. Thesis (~ 28 MB) Aug, 2012). “Measurement of Annealing Phenomena in High Purity Metals with Near-field High Energy X-ray Diffraction Microscopy.” This describes a first study of recrystallization by HEDM using aluminum as well as presenting characterization of six states of a well ordered nickel sample after successive annealing treatments. This data set is a subject of on-going analysis.
   5. S. F. Li Ph.D. Thesis (~ 28 MB) May, 2011). “Imaging of Orientation and Geometry in Microstructures: Development and Applications of High Energy x-ray Diffraction Microscopy.” This thesis, by the author of the IceNine reconstruction code (adapted and extended from RMS’s original Fortran), discusses the reconstruction approach and the steps necessary (meshing and others) to extract geometric features from the reconstructed, three dimensional orientation maps. These procedures are applied to the nickel annealing measurement (see Hefferan, above) and then to the first measurement of a sample (copper) undergoing tensile deformation.