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Title: Characterization of Crystallographic Structures Using Bragg-Edge Neutron Imaging at the Spallation Neutron Source

Abstract

Over the past decade, wavelength-dependent neutron radiography, also known as Bragg-edge imaging, has been employed as a non-destructive bulk characterization method due to its sensitivity to coherent elastic neutron scattering that is associated with crystalline structures. Several analysis approaches have been developed to quantitatively determine crystalline orientation, lattice strain, and phase distribution. In this study, we report a systematic investigation of the crystal structures of metallic materials (such as selected textureless powder samples and additively manufactured (AM) Inconel 718 samples), using Bragg-edge imaging at the Oak Ridge National Laboratory (ORNL) Spallation Neutron Source (SNS). Firstly, we have implemented a phenomenological Gaussian-based fitting in a Python-based computer called iBeatles. Secondly, we have developed a model-based approach to analyze Bragg-edge transmission spectra, which allows quantitative determination of the crystallographic attributes. Moreover, neutron diffraction measurements were carried out to validate the Bragg-edge analytical methods. These results demonstrate that the microstructural complexity (in this case, texture) plays a key role in determining the crystallographic parameters (lattice constant or interplanar spacing), which implies that the Bragg-edge image analysis methods must be carefully selected based on the material structures.

Authors:
 [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [2]; ORCiD logo [1];  [1]; ORCiD logo [1]
  1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  2. Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Materials & Manufacturing Technologies Office (AMMTO)
OSTI Identifier:
1995721
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Imaging
Additional Journal Information:
Journal Volume: 3; Journal Issue: 4; Journal ID: ISSN 2313-433X
Publisher:
MDPI
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; wavelength-dependent neutron radiography; Bragg-edge imaging; crystallographic characterization; additive manufacturing; Inconel 718

Citation Formats

Song, Gian, Lin, Jiao Y. Y., Bilheux, Jean Christophe, Xie, Qingge, Santodonato, Louis J., Molaison, Jamie J., Skorpenske, Harley D., Dos Santos, Antonio Moreira, Tulk, Christopher A., An, Ke, Stoica, Alexandru Dan, Kirka, Michael M., Dehoff, Ryan R., Tremsin, Anton S., Bunn, Jeffrey R., Sochalski-Kolbus, Lindsay M., and Bilheux, Hassina Z. Characterization of Crystallographic Structures Using Bragg-Edge Neutron Imaging at the Spallation Neutron Source. United States: N. p., 2017. Web. doi:10.3390/jimaging3040065.
Song, Gian, Lin, Jiao Y. Y., Bilheux, Jean Christophe, Xie, Qingge, Santodonato, Louis J., Molaison, Jamie J., Skorpenske, Harley D., Dos Santos, Antonio Moreira, Tulk, Christopher A., An, Ke, Stoica, Alexandru Dan, Kirka, Michael M., Dehoff, Ryan R., Tremsin, Anton S., Bunn, Jeffrey R., Sochalski-Kolbus, Lindsay M., & Bilheux, Hassina Z. Characterization of Crystallographic Structures Using Bragg-Edge Neutron Imaging at the Spallation Neutron Source. United States. https://doi.org/10.3390/jimaging3040065
Song, Gian, Lin, Jiao Y. Y., Bilheux, Jean Christophe, Xie, Qingge, Santodonato, Louis J., Molaison, Jamie J., Skorpenske, Harley D., Dos Santos, Antonio Moreira, Tulk, Christopher A., An, Ke, Stoica, Alexandru Dan, Kirka, Michael M., Dehoff, Ryan R., Tremsin, Anton S., Bunn, Jeffrey R., Sochalski-Kolbus, Lindsay M., and Bilheux, Hassina Z. Wed . "Characterization of Crystallographic Structures Using Bragg-Edge Neutron Imaging at the Spallation Neutron Source". United States. https://doi.org/10.3390/jimaging3040065. https://www.osti.gov/servlets/purl/1995721.
@article{osti_1995721,
title = {Characterization of Crystallographic Structures Using Bragg-Edge Neutron Imaging at the Spallation Neutron Source},
author = {Song, Gian and Lin, Jiao Y. Y. and Bilheux, Jean Christophe and Xie, Qingge and Santodonato, Louis J. and Molaison, Jamie J. and Skorpenske, Harley D. and Dos Santos, Antonio Moreira and Tulk, Christopher A. and An, Ke and Stoica, Alexandru Dan and Kirka, Michael M. and Dehoff, Ryan R. and Tremsin, Anton S. and Bunn, Jeffrey R. and Sochalski-Kolbus, Lindsay M. and Bilheux, Hassina Z.},
abstractNote = {Over the past decade, wavelength-dependent neutron radiography, also known as Bragg-edge imaging, has been employed as a non-destructive bulk characterization method due to its sensitivity to coherent elastic neutron scattering that is associated with crystalline structures. Several analysis approaches have been developed to quantitatively determine crystalline orientation, lattice strain, and phase distribution. In this study, we report a systematic investigation of the crystal structures of metallic materials (such as selected textureless powder samples and additively manufactured (AM) Inconel 718 samples), using Bragg-edge imaging at the Oak Ridge National Laboratory (ORNL) Spallation Neutron Source (SNS). Firstly, we have implemented a phenomenological Gaussian-based fitting in a Python-based computer called iBeatles. Secondly, we have developed a model-based approach to analyze Bragg-edge transmission spectra, which allows quantitative determination of the crystallographic attributes. Moreover, neutron diffraction measurements were carried out to validate the Bragg-edge analytical methods. These results demonstrate that the microstructural complexity (in this case, texture) plays a key role in determining the crystallographic parameters (lattice constant or interplanar spacing), which implies that the Bragg-edge image analysis methods must be carefully selected based on the material structures.},
doi = {10.3390/jimaging3040065},
journal = {Journal of Imaging},
number = 4,
volume = 3,
place = {United States},
year = {Wed Dec 20 00:00:00 EST 2017},
month = {Wed Dec 20 00:00:00 EST 2017}
}

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