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Title: Voxel-based strain tensors from near-field High Energy Diffraction Microscopy

Journal Article · · Current Opinion in Solid State and Materials Science

High energy X-ray diffraction microscopy is one of several techniques that use spatially resolved diffraction to nondestructively map crystal unit cell orientations in three dimensions inside bulk polycrystalline samples. The near-field variant of the technique (nf-HEDM) yields grain shapes, grain boundary character information, and intra-granular orientation variations. Here, we demonstrate, through analysis of simulated and physical data sets, the extension nf-HEDM to include mapping of heterogeneous intra-granular strain states with spatial re­solution on the micron scale. Sensitivity to all strain tensor components is < 5 × 10**-4 . The GPU assisted im­plementation of an optimization algorithm is described.

Research Organization:
Carnegie Mellon Univ., Pittsburgh, PA (United States); Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
SC0019096; AC02-06CH11357
OSTI ID:
1769538
Alternate ID(s):
OSTI ID: 1650350; OSTI ID: 1650353
Report Number(s):
DOE-CMU-0019096; S1359028620300504; 100852; PII: S1359028620300504
Journal Information:
Current Opinion in Solid State and Materials Science, Journal Name: Current Opinion in Solid State and Materials Science Vol. 24 Journal Issue: 4; ISSN 1359-0286
Publisher:
ElsevierCopyright Statement
Country of Publication:
United Kingdom
Language:
English

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