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Title: Applying neutron transmission physics and 3D statistical full-field model to understand 2D Bragg-edge imaging

Abstract

Bragg-edge imaging, which is also known as neutron radiography, has recently emerged as a novel crystalline characterization technique. Modelling of this novel technique by incorporating various features of the underlying microstructure (including the crystallographic texture, the morphological texture, and the grain size) of the material remains a subject of considerable research and development. In this paper, Inconel 718 samples made by additive manufacturing were investigated by neutron diffraction and neutron radiography techniques. The specimen features strong morphological and crystallographic textures and a highly heterogeneous microstructure. A 3D statistical full-field model is introduced by taking details of the microstructure into account to understand the experimental neutron radiography results. The Bragg-edge imaging and the total cross section were calculated based on the neutron transmission physics. A good match was obtained between the model predictions and experimental results at different incident beam angles with respect to the sample build direction. The current theoretical approach has the ability to incorporate 3D spatially resolved microstructural heterogeneity information and shows promise in understanding the 2D neutron radiography of bulk samples. With further development to incorporate the heterogeneity in lattice strain in the model, it can be used as a powerful tool in the future to bettermore » understand the neutron radiography data.« less

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1429192
Alternate Identifier(s):
OSTI ID: 1421304
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 123; Journal Issue: 7; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Xie, Qingge, Song, Gian, Gorti, Sarma B., Stoica, Alexandru Dan, Radhakrishnan, Balasubramaniam, Bilheux, Jean-Christophe, Kirka, Michael M., Dehoff, Ryan R., Bilheux, Hassina Z., and An, Ke. Applying neutron transmission physics and 3D statistical full-field model to understand 2D Bragg-edge imaging. United States: N. p., 2018. Web. doi:10.1063/1.5013676.
Xie, Qingge, Song, Gian, Gorti, Sarma B., Stoica, Alexandru Dan, Radhakrishnan, Balasubramaniam, Bilheux, Jean-Christophe, Kirka, Michael M., Dehoff, Ryan R., Bilheux, Hassina Z., & An, Ke. Applying neutron transmission physics and 3D statistical full-field model to understand 2D Bragg-edge imaging. United States. doi:10.1063/1.5013676.
Xie, Qingge, Song, Gian, Gorti, Sarma B., Stoica, Alexandru Dan, Radhakrishnan, Balasubramaniam, Bilheux, Jean-Christophe, Kirka, Michael M., Dehoff, Ryan R., Bilheux, Hassina Z., and An, Ke. Wed . "Applying neutron transmission physics and 3D statistical full-field model to understand 2D Bragg-edge imaging". United States. doi:10.1063/1.5013676.
@article{osti_1429192,
title = {Applying neutron transmission physics and 3D statistical full-field model to understand 2D Bragg-edge imaging},
author = {Xie, Qingge and Song, Gian and Gorti, Sarma B. and Stoica, Alexandru Dan and Radhakrishnan, Balasubramaniam and Bilheux, Jean-Christophe and Kirka, Michael M. and Dehoff, Ryan R. and Bilheux, Hassina Z. and An, Ke},
abstractNote = {Bragg-edge imaging, which is also known as neutron radiography, has recently emerged as a novel crystalline characterization technique. Modelling of this novel technique by incorporating various features of the underlying microstructure (including the crystallographic texture, the morphological texture, and the grain size) of the material remains a subject of considerable research and development. In this paper, Inconel 718 samples made by additive manufacturing were investigated by neutron diffraction and neutron radiography techniques. The specimen features strong morphological and crystallographic textures and a highly heterogeneous microstructure. A 3D statistical full-field model is introduced by taking details of the microstructure into account to understand the experimental neutron radiography results. The Bragg-edge imaging and the total cross section were calculated based on the neutron transmission physics. A good match was obtained between the model predictions and experimental results at different incident beam angles with respect to the sample build direction. The current theoretical approach has the ability to incorporate 3D spatially resolved microstructural heterogeneity information and shows promise in understanding the 2D neutron radiography of bulk samples. With further development to incorporate the heterogeneity in lattice strain in the model, it can be used as a powerful tool in the future to better understand the neutron radiography data.},
doi = {10.1063/1.5013676},
journal = {Journal of Applied Physics},
number = 7,
volume = 123,
place = {United States},
year = {Wed Feb 21 00:00:00 EST 2018},
month = {Wed Feb 21 00:00:00 EST 2018}
}

Journal Article:
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