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Spatial resolution of a laboratory based X-Ray cone-beam laminography scanning system for various trajectories

Spatial resolution of a laboratory based X-Ray cone-beam laminography scanning system for various trajectories
Spatial resolution of a laboratory based X-Ray cone-beam laminography scanning system for various trajectories
Computed laminography (CL), a long established NDT method, is ideal for the non-destructive evaluation of plate-like structures, for which conventional computed tomography (CT) is less well suited. This paper demonstrates the feasibility of implementing raster CL on a Nikon Metrology custom build X-ray CT scanner without the need for specialised equipment. To provide a more principled way to demonstrate the widespread adoption of CL for defect characterization in plate-like structures, a test specimen was designed and manufactured from Polyoxymethylene (Delrin) that allows well defined features of different size and orientation to be characterized. The study highlights the relation between direction-dependent spatial resolution, feature geometry and scan trajectory. It demonstrates that high-resolution and high-speed in situ volume-imaging of plate-like structures with large aspect ratios is viable at levels that would be challenging via CT or alternative three-dimensional NDT methods.
Computed laminography, Resolution
0963-8695
Deyhle, Hans
aba9cd34-97a0-4238-8255-af673e3beb1a
Towsyfyan, Hossein
f1f4fa2a-20e4-4519-a66b-2faecb50173d
Biguri, Ander
738d1b66-9a99-446f-805d-032dd12445e3
Mavrogordato, Mark
faedf03d-e357-4ec3-818e-e5ff5368fdf0
Boardman, Richard
5818d677-5732-4e8a-a342-7164dbb10df1
Blumensath, Thomas
470d9055-0373-457e-bf80-4389f8ec4ead
Deyhle, Hans
aba9cd34-97a0-4238-8255-af673e3beb1a
Towsyfyan, Hossein
f1f4fa2a-20e4-4519-a66b-2faecb50173d
Biguri, Ander
738d1b66-9a99-446f-805d-032dd12445e3
Mavrogordato, Mark
faedf03d-e357-4ec3-818e-e5ff5368fdf0
Boardman, Richard
5818d677-5732-4e8a-a342-7164dbb10df1
Blumensath, Thomas
470d9055-0373-457e-bf80-4389f8ec4ead

Deyhle, Hans, Towsyfyan, Hossein, Biguri, Ander, Mavrogordato, Mark, Boardman, Richard and Blumensath, Thomas (2020) Spatial resolution of a laboratory based X-Ray cone-beam laminography scanning system for various trajectories. NDT & E International, 111, [102222]. (doi:10.1016/j.ndteint.2020.102222).

Record type: Article

Abstract

Computed laminography (CL), a long established NDT method, is ideal for the non-destructive evaluation of plate-like structures, for which conventional computed tomography (CT) is less well suited. This paper demonstrates the feasibility of implementing raster CL on a Nikon Metrology custom build X-ray CT scanner without the need for specialised equipment. To provide a more principled way to demonstrate the widespread adoption of CL for defect characterization in plate-like structures, a test specimen was designed and manufactured from Polyoxymethylene (Delrin) that allows well defined features of different size and orientation to be characterized. The study highlights the relation between direction-dependent spatial resolution, feature geometry and scan trajectory. It demonstrates that high-resolution and high-speed in situ volume-imaging of plate-like structures with large aspect ratios is viable at levels that would be challenging via CT or alternative three-dimensional NDT methods.

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More information

Accepted/In Press date: 14 January 2020
e-pub ahead of print date: 20 January 2020
Published date: April 2020
Keywords: Computed laminography, Resolution

Identifiers

Local EPrints ID: 437617
URI: http://eprints.soton.ac.uk/id/eprint/437617
ISSN: 0963-8695
PURE UUID: 6616aa31-802d-45b9-8da7-8a1e150b607e
ORCID for Richard Boardman: ORCID iD orcid.org/0000-0002-4008-0098

Catalogue record

Date deposited: 06 Feb 2020 17:33
Last modified: 26 Nov 2021 06:53

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Contributors

Author: Hans Deyhle
Author: Hossein Towsyfyan
Author: Ander Biguri
Author: Mark Mavrogordato

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