Plastic strain and residual stress distributions in an AISI 304 stainless steel BWR pipe weld

Tapio Saukkonen, Miikka Aalto, Iikka Virkkunen, Ulla Ehrnstén, Hannu Hänninen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

4 Citations (Scopus)

Abstract

In AISI 304 stainless steel pipe welds weld shrinkage causes large variations in residual plastic strain in different parts of the weld metal and heat-affected zone (HAZ). The amount of strain was analyzed by EBSD quantitatively by comparing the intra-grain misorientations to the calibration curve. Highest degrees of plastic strain (10.20%) were detected in the HAZ close to the root area of a prototypical BWR plant weld. Strain in the weld metal varies in the different directions of solidification, being high in the weld bead boundaries and near the fusion lines. Preliminary studies of the effects of mechanical and elastic anisotropy of the weld metal microstructure on the grain size level were performed by EBSD and nanoindentation. The residual stress distribution in the same weld cross-section was determined by a contour method. The residual strain and stress distributions are superimposed and EAC susceptibility of various areas of the pipe weld is evaluated and discussed.
Original languageEnglish
Title of host publicationProceedings of the 15th international Conference on Environmental Degradation of Materials in Nuclear power Systems - Water reactors
EditorsGabriell Ilevbare, Jeremy Busby, Peter Andersen
Pages2351-2367
ISBN (Electronic)978-3-319-48760-1
Publication statusPublished - 2011
MoE publication typeA4 Article in a conference publication
Event15th international Conference on Environmental Degradation of Materials in Nuclear power Systems - Water reactors - Colorado Springs, CO, United States
Duration: 7 Aug 201111 Aug 2011

Conference

Conference15th international Conference on Environmental Degradation of Materials in Nuclear power Systems - Water reactors
CountryUnited States
CityColorado Springs, CO
Period7/08/1111/08/11

Fingerprint

Stress concentration
Residual stresses
Plastic deformation
Welds
Stainless steel
Pipe
Heat affected zone
Metals
Steel pipe
Nanoindentation
Solidification
Anisotropy
Fusion reactions
Calibration
Microstructure

Keywords

  • Electron backsacatter diffraction
  • stainless steel piping
  • welding
  • boiling water reactor
  • stress corrosion cracking
  • residual stress and strain
  • mechanical anisotropy

Cite this

Saukkonen, T., Aalto, M., Virkkunen, I., Ehrnstén, U., & Hänninen, H. (2011). Plastic strain and residual stress distributions in an AISI 304 stainless steel BWR pipe weld. In G. Ilevbare, J. Busby, & P. Andersen (Eds.), Proceedings of the 15th international Conference on Environmental Degradation of Materials in Nuclear power Systems - Water reactors (pp. 2351-2367)
Saukkonen, Tapio ; Aalto, Miikka ; Virkkunen, Iikka ; Ehrnstén, Ulla ; Hänninen, Hannu. / Plastic strain and residual stress distributions in an AISI 304 stainless steel BWR pipe weld. Proceedings of the 15th international Conference on Environmental Degradation of Materials in Nuclear power Systems - Water reactors. editor / Gabriell Ilevbare ; Jeremy Busby ; Peter Andersen. 2011. pp. 2351-2367
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title = "Plastic strain and residual stress distributions in an AISI 304 stainless steel BWR pipe weld",
abstract = "In AISI 304 stainless steel pipe welds weld shrinkage causes large variations in residual plastic strain in different parts of the weld metal and heat-affected zone (HAZ). The amount of strain was analyzed by EBSD quantitatively by comparing the intra-grain misorientations to the calibration curve. Highest degrees of plastic strain (10.20{\%}) were detected in the HAZ close to the root area of a prototypical BWR plant weld. Strain in the weld metal varies in the different directions of solidification, being high in the weld bead boundaries and near the fusion lines. Preliminary studies of the effects of mechanical and elastic anisotropy of the weld metal microstructure on the grain size level were performed by EBSD and nanoindentation. The residual stress distribution in the same weld cross-section was determined by a contour method. The residual strain and stress distributions are superimposed and EAC susceptibility of various areas of the pipe weld is evaluated and discussed.",
keywords = "Electron backsacatter diffraction, stainless steel piping, welding, boiling water reactor, stress corrosion cracking, residual stress and strain, mechanical anisotropy",
author = "Tapio Saukkonen and Miikka Aalto and Iikka Virkkunen and Ulla Ehrnst{\'e}n and Hannu H{\"a}nninen",
note = "Project code: 73749",
year = "2011",
language = "English",
pages = "2351--2367",
editor = "Gabriell Ilevbare and Jeremy Busby and Peter Andersen",
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Saukkonen, T, Aalto, M, Virkkunen, I, Ehrnstén, U & Hänninen, H 2011, Plastic strain and residual stress distributions in an AISI 304 stainless steel BWR pipe weld. in G Ilevbare, J Busby & P Andersen (eds), Proceedings of the 15th international Conference on Environmental Degradation of Materials in Nuclear power Systems - Water reactors. pp. 2351-2367, 15th international Conference on Environmental Degradation of Materials in Nuclear power Systems - Water reactors, Colorado Springs, CO, United States, 7/08/11.

Plastic strain and residual stress distributions in an AISI 304 stainless steel BWR pipe weld. / Saukkonen, Tapio; Aalto, Miikka; Virkkunen, Iikka; Ehrnstén, Ulla; Hänninen, Hannu.

Proceedings of the 15th international Conference on Environmental Degradation of Materials in Nuclear power Systems - Water reactors. ed. / Gabriell Ilevbare; Jeremy Busby; Peter Andersen. 2011. p. 2351-2367.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

TY - GEN

T1 - Plastic strain and residual stress distributions in an AISI 304 stainless steel BWR pipe weld

AU - Saukkonen, Tapio

AU - Aalto, Miikka

AU - Virkkunen, Iikka

AU - Ehrnstén, Ulla

AU - Hänninen, Hannu

N1 - Project code: 73749

PY - 2011

Y1 - 2011

N2 - In AISI 304 stainless steel pipe welds weld shrinkage causes large variations in residual plastic strain in different parts of the weld metal and heat-affected zone (HAZ). The amount of strain was analyzed by EBSD quantitatively by comparing the intra-grain misorientations to the calibration curve. Highest degrees of plastic strain (10.20%) were detected in the HAZ close to the root area of a prototypical BWR plant weld. Strain in the weld metal varies in the different directions of solidification, being high in the weld bead boundaries and near the fusion lines. Preliminary studies of the effects of mechanical and elastic anisotropy of the weld metal microstructure on the grain size level were performed by EBSD and nanoindentation. The residual stress distribution in the same weld cross-section was determined by a contour method. The residual strain and stress distributions are superimposed and EAC susceptibility of various areas of the pipe weld is evaluated and discussed.

AB - In AISI 304 stainless steel pipe welds weld shrinkage causes large variations in residual plastic strain in different parts of the weld metal and heat-affected zone (HAZ). The amount of strain was analyzed by EBSD quantitatively by comparing the intra-grain misorientations to the calibration curve. Highest degrees of plastic strain (10.20%) were detected in the HAZ close to the root area of a prototypical BWR plant weld. Strain in the weld metal varies in the different directions of solidification, being high in the weld bead boundaries and near the fusion lines. Preliminary studies of the effects of mechanical and elastic anisotropy of the weld metal microstructure on the grain size level were performed by EBSD and nanoindentation. The residual stress distribution in the same weld cross-section was determined by a contour method. The residual strain and stress distributions are superimposed and EAC susceptibility of various areas of the pipe weld is evaluated and discussed.

KW - Electron backsacatter diffraction

KW - stainless steel piping

KW - welding

KW - boiling water reactor

KW - stress corrosion cracking

KW - residual stress and strain

KW - mechanical anisotropy

M3 - Conference article in proceedings

SP - 2351

EP - 2367

BT - Proceedings of the 15th international Conference on Environmental Degradation of Materials in Nuclear power Systems - Water reactors

A2 - Ilevbare, Gabriell

A2 - Busby, Jeremy

A2 - Andersen, Peter

ER -

Saukkonen T, Aalto M, Virkkunen I, Ehrnstén U, Hänninen H. Plastic strain and residual stress distributions in an AISI 304 stainless steel BWR pipe weld. In Ilevbare G, Busby J, Andersen P, editors, Proceedings of the 15th international Conference on Environmental Degradation of Materials in Nuclear power Systems - Water reactors. 2011. p. 2351-2367