Energy-resolved neutron imaging for reconstruction of strain introduced by cold working

Anton S. Tremsin; Winfried Kockelmann; Joe F. Kelleher; Anna M. Paradowska; Ranggi S. Ramadhan; Michael E. Fitzpatrick

doi:10.3390/jimaging4030048

Energy-resolved neutron imaging for reconstruction of strain introduced by cold working

Anton S. Tremsin, Winfried Kockelmann, Joe F. Kelleher, Anna M. Paradowska, Ranggi S. Ramadhan, Michael E. Fitzpatrick

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Abstract

Energy-resolved neutron transmission imaging is used to reconstruct maps of residual strains in drilled and cold-expanded holes in 5-mm and 6.4-mm-thick aluminum plates. The possibility of measuring the positions of Bragg edges in the transmission spectrum in each 55 × 55 µm ² pixel is utilized in the reconstruction of the strain distribution within the entire imaged area of the sample, all from a single measurement. Although the reconstructed strain is averaged through the sample thickness, this technique reveals strain asymmetries within the sample and thus provides information complementary to other well-established non-destructive testing methods.

Original language	English
Article number	48
Number of pages	12
Journal	Journal of Imaging
Volume	4
Issue number	3
DOIs	https://doi.org/10.3390/jimaging4030048
Publication status	Published - 28 Feb 2018

Bibliographical note

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution
(CC BY) license (http://creativecommons.org/licenses/by/4.0/).

Funding

Acknowledgments: Authors would like to acknowledge the generous donation of the Vertex FPGA and ISE design suite by Xilinx Inc. of San Jose, California, through their Xilinx University Program. The detector used in these experiments was developed in a collaboration between UC Berkeley and Nova Scientific, partially funded by the US Department of Energy under STTR grant Nos. DE-FG02-07ER86322, DE-FG02-08ER86353 and DE-SC0009657. The Timepix readout was developed within the Medipix collaboration. MEF is grateful for funding from the Lloyd’s Register Foundation, a charitable foundation helping protect life and property by supporting engineering-related education, public engagement, and the application of research.

Keywords

Bragg edge imaging
Neutron transmission
Residual strain

ASJC Scopus subject areas

Radiology Nuclear Medicine and imaging
Computer Vision and Pattern Recognition
Computer Graphics and Computer-Aided Design
Electrical and Electronic Engineering

Access to Document

10.3390/jimaging4030048Licence: CC BY

PublishedFinal published version, 4.92 MBLicence: CC BY

Cite this

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title = "Energy-resolved neutron imaging for reconstruction of strain introduced by cold working",

abstract = " Energy-resolved neutron transmission imaging is used to reconstruct maps of residual strains in drilled and cold-expanded holes in 5-mm and 6.4-mm-thick aluminum plates. The possibility of measuring the positions of Bragg edges in the transmission spectrum in each 55 × 55 µm 2 pixel is utilized in the reconstruction of the strain distribution within the entire imaged area of the sample, all from a single measurement. Although the reconstructed strain is averaged through the sample thickness, this technique reveals strain asymmetries within the sample and thus provides information complementary to other well-established non-destructive testing methods. ",

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AU - Ramadhan, Ranggi S.

AU - Fitzpatrick, Michael E.

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N2 - Energy-resolved neutron transmission imaging is used to reconstruct maps of residual strains in drilled and cold-expanded holes in 5-mm and 6.4-mm-thick aluminum plates. The possibility of measuring the positions of Bragg edges in the transmission spectrum in each 55 × 55 µm 2 pixel is utilized in the reconstruction of the strain distribution within the entire imaged area of the sample, all from a single measurement. Although the reconstructed strain is averaged through the sample thickness, this technique reveals strain asymmetries within the sample and thus provides information complementary to other well-established non-destructive testing methods.

AB - Energy-resolved neutron transmission imaging is used to reconstruct maps of residual strains in drilled and cold-expanded holes in 5-mm and 6.4-mm-thick aluminum plates. The possibility of measuring the positions of Bragg edges in the transmission spectrum in each 55 × 55 µm 2 pixel is utilized in the reconstruction of the strain distribution within the entire imaged area of the sample, all from a single measurement. Although the reconstructed strain is averaged through the sample thickness, this technique reveals strain asymmetries within the sample and thus provides information complementary to other well-established non-destructive testing methods.

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Energy-resolved neutron imaging for reconstruction of strain introduced by cold working

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

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