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
    @inproceedings{9d9d8d3686f948e592aa11f6ef9e3a5b,
    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",
    booktitle = "Proceedings of the 15th international Conference on Environmental Degradation of Materials in Nuclear power Systems - Water reactors",

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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