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Title: Investigation of microstructure in additive manufactured Inconel 625 by spatially resolved neutron transmission spectroscopy

Abstract

Non-destructive testing techniques based on neutron imaging and diffraction can provide information on the internal structure of relatively thick metal samples (up to several cm), which are opaque to other conventional non-destructive methods. Spatially resolved neutron transmission spectroscopy is an extension of traditional neutron radiography, where multiple images are acquired simultaneously, each corresponding to a narrow range of energy. The analysis of transmission spectra enables studies of bulk microstructures at the spatial resolution comparable to the detector pixel. In this study we demonstrate the possibility of imaging (with ~100 μm resolution) distribution of some microstructure properties, such as residual strain, texture, voids and impurities in Inconel 625 samples manufactured with an additive manufacturing method called direct metal laser melting (DMLM). Although this imaging technique can be implemented only in a few large-scale facilities, it can be a valuable tool for optimization of additive manufacturing techniques and materials and for correlating bulk microstructure properties to manufacturing process parameters. Additionally, the experimental strain distribution can help validate finite element models which many industries use to predict the residual stress distributions in additive manufactured components.

Authors:
 [1];  [2];  [2];  [3];  [4]
+ Show Author Affiliations
  1. Space Sciences Laboratory, University of California at Berkeley, Berkeley, CA, USA
  2. General Electric Global Research Center, Niskayuna, NY, USA
  3. Consiglio Nazionale delle Ricerche, Istituto Sistemi Complessi (CNR-ISC), Sesto Fiorentino (FI), Italy
  4. Japan Atomic Energy Agency Tokai-mura, Naka-gun Ibaraki, Japan
Publication Date:
Research Org.:
NOVA Scientific, Inc., Sturbridge, MA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1510149
Alternate Identifier(s):
OSTI ID: 1313815
Grant/Contract Number:  
FG02-07ER86322; FG02-08ER86353 and DE-SC0009; SC0009657
Resource Type:
Published Article
Journal Name:
Science and Technology of Advanced Materials
Additional Journal Information:
Journal Name: Science and Technology of Advanced Materials Journal Volume: 17 Journal Issue: 1; Journal ID: ISSN 1468-6996
Publisher:
Informa UK Limited
Country of Publication:
United Kingdom
Language:
English
Subject:
36 MATERIALS SCIENCE; non-destructive testing; additive manufacturing; microstructure; neutron imaging

Citation Formats

Tremsin, Anton S., Gao, Yan, Dial, Laura C., Grazzi, Francesco, and Shinohara, Takenao. Investigation of microstructure in additive manufactured Inconel 625 by spatially resolved neutron transmission spectroscopy. United Kingdom: N. p., 2016. Web. doi:10.1080/14686996.2016.1190261.
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Tremsin, Anton S., Gao, Yan, Dial, Laura C., Grazzi, Francesco, & Shinohara, Takenao. Investigation of microstructure in additive manufactured Inconel 625 by spatially resolved neutron transmission spectroscopy. United Kingdom. https://doi.org/10.1080/14686996.2016.1190261
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Tremsin, Anton S., Gao, Yan, Dial, Laura C., Grazzi, Francesco, and Shinohara, Takenao. Fri . "Investigation of microstructure in additive manufactured Inconel 625 by spatially resolved neutron transmission spectroscopy". United Kingdom. https://doi.org/10.1080/14686996.2016.1190261.
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@article{osti_1510149,
title = {Investigation of microstructure in additive manufactured Inconel 625 by spatially resolved neutron transmission spectroscopy},
author = {Tremsin, Anton S. and Gao, Yan and Dial, Laura C. and Grazzi, Francesco and Shinohara, Takenao},
abstractNote = {Non-destructive testing techniques based on neutron imaging and diffraction can provide information on the internal structure of relatively thick metal samples (up to several cm), which are opaque to other conventional non-destructive methods. Spatially resolved neutron transmission spectroscopy is an extension of traditional neutron radiography, where multiple images are acquired simultaneously, each corresponding to a narrow range of energy. The analysis of transmission spectra enables studies of bulk microstructures at the spatial resolution comparable to the detector pixel. In this study we demonstrate the possibility of imaging (with ~100 μm resolution) distribution of some microstructure properties, such as residual strain, texture, voids and impurities in Inconel 625 samples manufactured with an additive manufacturing method called direct metal laser melting (DMLM). Although this imaging technique can be implemented only in a few large-scale facilities, it can be a valuable tool for optimization of additive manufacturing techniques and materials and for correlating bulk microstructure properties to manufacturing process parameters. Additionally, the experimental strain distribution can help validate finite element models which many industries use to predict the residual stress distributions in additive manufactured components.},
doi = {10.1080/14686996.2016.1190261},
journal = {Science and Technology of Advanced Materials},
number = 1,
volume = 17,
place = {United Kingdom},
year = {Fri Jul 08 00:00:00 EDT 2016},
month = {Fri Jul 08 00:00:00 EDT 2016}
}
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https://doi.org/10.1080/14686996.2016.1190261
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Works referenced in this record:

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Issue Information
journal, August 2012

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    Works referencing / citing this record:

    Applying neutron transmission physics and 3D statistical full-field model to understand 2D Bragg-edge imaging
    journal, February 2018

    • Xie, Q.; Song, G.; Gorti, S.
    • Journal of Applied Physics, Vol. 123, Issue 7
    • DOI: 10.1063/1.5013676

    Bragg-edge elastic strain tomography for in situ systems from energy-resolved neutron transmission imaging
    journal, October 2017

    Characterization of Crystallographic Structures Using Bragg-Edge Neutron Imaging at the Spallation Neutron Source
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    Materials and Life Science Experimental Facility (MLF) at the Japan Proton Accelerator Research Complex II: Neutron Scattering Instruments
    journal, November 2017

    • Nakajima, Kenji; Kawakita, Yukinobu; Itoh, Shinichi
    • Quantum Beam Science, Vol. 1, Issue 3
    • DOI: 10.3390/qubs1030009
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