15 Citations (Scopus)

Abstract

Abstract Underwater wet welding is performed in direct contact with other, with high cooling rates and gas metal reactions that lead to the formation of pores, cracks and inclusions in the weld metal. These discontinuities appear in a wide range of sizes, shapes and orientations, and require 3D techniques for complete characterization. Lab scale X-ray MicroCT was used to analyze pores and cracks, while synchrotron MicroCT and FIB/SEM were used to characterize inclusions. Specific image analysis sequences were developed to deal with different types of noise, segment the discontinuities, eliminate spurious features, and measure 3D parameters. The relevant objects were rendered in 3D, confirming the expected size and orientation characteristics. Whenever possible, results from different scales and techniques were compared.

Original languageEnglish (US)
Article number7991
Pages (from-to)358-366
Number of pages9
JournalMaterials Characterization
Volume107
DOIs
StatePublished - Aug 17 2015

Fingerprint

discontinuity
Welds
cracks
inclusions
Cracks
porosity
Synchrotrons
image analysis
welding
metals
Image analysis
synchrotrons
Welding
Metals
Cooling
cooling
X rays
Scanning electron microscopy
scanning electron microscopy
gases

Keywords

  • 3D image analysis
  • Discontinuities
  • FIB/SEM
  • Underwater wet welds
  • X-ray MicroCT

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Multiscale 3D characterization of discontinuities in underwater wet welds. / Silva, L. F.; Dos Santos, V. R.; Paciornik, S.; Mertens, J. C E; Chawla, Nikhilesh.

In: Materials Characterization, Vol. 107, 7991, 17.08.2015, p. 358-366.

Research output: Contribution to journalArticle

Silva, L. F. ; Dos Santos, V. R. ; Paciornik, S. ; Mertens, J. C E ; Chawla, Nikhilesh. / Multiscale 3D characterization of discontinuities in underwater wet welds. In: Materials Characterization. 2015 ; Vol. 107. pp. 358-366.
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AU - Silva, L. F.

AU - Dos Santos, V. R.

AU - Paciornik, S.

AU - Mertens, J. C E

AU - Chawla, Nikhilesh

PY - 2015/8/17

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N2 - Abstract Underwater wet welding is performed in direct contact with other, with high cooling rates and gas metal reactions that lead to the formation of pores, cracks and inclusions in the weld metal. These discontinuities appear in a wide range of sizes, shapes and orientations, and require 3D techniques for complete characterization. Lab scale X-ray MicroCT was used to analyze pores and cracks, while synchrotron MicroCT and FIB/SEM were used to characterize inclusions. Specific image analysis sequences were developed to deal with different types of noise, segment the discontinuities, eliminate spurious features, and measure 3D parameters. The relevant objects were rendered in 3D, confirming the expected size and orientation characteristics. Whenever possible, results from different scales and techniques were compared.

AB - Abstract Underwater wet welding is performed in direct contact with other, with high cooling rates and gas metal reactions that lead to the formation of pores, cracks and inclusions in the weld metal. These discontinuities appear in a wide range of sizes, shapes and orientations, and require 3D techniques for complete characterization. Lab scale X-ray MicroCT was used to analyze pores and cracks, while synchrotron MicroCT and FIB/SEM were used to characterize inclusions. Specific image analysis sequences were developed to deal with different types of noise, segment the discontinuities, eliminate spurious features, and measure 3D parameters. The relevant objects were rendered in 3D, confirming the expected size and orientation characteristics. Whenever possible, results from different scales and techniques were compared.

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KW - Underwater wet welds

KW - X-ray MicroCT

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