Investigating nano-precipitation in a V-containing HSLA steel using small angle neutron scattering

Y.Q. Wang, S.J. Clark, V. Janik, R.K. Heenan, D. Alba Venero, K. Yan, D.G. McCartney, Seetharaman Sridhar, P.D. Lee

    Research output: Contribution to journalArticle

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    Abstract

    Abstract Interphase precipitation (IPP) of nanoscale carbides in a vanadium-containing high-strength low-alloy steel has been investigated. Small angle neutron scattering (SANS) and transmission electron microscopy (TEM) were employed to characterize the precipitates and their size distributions in Fe-0.047C-0.2V-1.6Mn (in wt.%) alloy samples which had been austenitized, isothermally transformed at 700 °C for between 3 and 600 min and water quenched. TEM confirms that, following heat treatment, rows of vanadium-containing nanoscale interphase precipitates were present. Model-independent analysis of the nuclear SANS signal and model fitting calculations, using oblate spheroid and disc-shapes, were performed. The major axis diameter increased from 18 nm after 3 min to 35 nm after 600 min. Precipitate volume percent increased from 0.09 to 0.22 vol% over the same period and number density fell from 2 × 1021 to 5 × 1020 m−3. A limited number of measurements of precipitate maximum diameters from TEM images showed the mean value increased from 8 nm after 5 min to 28 nm after 600 min which is in reasonable agreement with the SANS data.

    Original languageEnglish
    Pages (from-to)84-96
    Number of pages13
    JournalActa Materialia
    Volume145
    Early online date1 Dec 2017
    DOIs
    Publication statusPublished - 15 Feb 2018

    Fingerprint

    Steel
    Neutron scattering
    Precipitates
    Vanadium
    Transmission electron microscopy
    High strength steel
    Carbides
    Heat treatment
    Water

    Bibliographical note

    NOTICE: this is the author’s version of a work that was accepted for publication in Acta Materialia. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Acta Materialia, [145, (2017)] DOI: 10.1016/j.actamat.2017.11.032

    © 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

    Keywords

    • Microalloyed steel
    • Precipitation
    • Small angle scattering
    • Transmission electron microscopy

    Cite this

    Investigating nano-precipitation in a V-containing HSLA steel using small angle neutron scattering. / Wang, Y.Q.; Clark, S.J.; Janik, V.; Heenan, R.K.; Venero, D. Alba; Yan, K.; McCartney, D.G.; Sridhar, Seetharaman; Lee, P.D.

    In: Acta Materialia, Vol. 145, 15.02.2018, p. 84-96.

    Research output: Contribution to journalArticle

    Wang, YQ, Clark, SJ, Janik, V, Heenan, RK, Venero, DA, Yan, K, McCartney, DG, Sridhar, S & Lee, PD 2018, 'Investigating nano-precipitation in a V-containing HSLA steel using small angle neutron scattering' Acta Materialia, vol. 145, pp. 84-96. https://doi.org/10.1016/j.actamat.2017.11.032
    Wang, Y.Q. ; Clark, S.J. ; Janik, V. ; Heenan, R.K. ; Venero, D. Alba ; Yan, K. ; McCartney, D.G. ; Sridhar, Seetharaman ; Lee, P.D. / Investigating nano-precipitation in a V-containing HSLA steel using small angle neutron scattering. In: Acta Materialia. 2018 ; Vol. 145. pp. 84-96.
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    abstract = "Abstract Interphase precipitation (IPP) of nanoscale carbides in a vanadium-containing high-strength low-alloy steel has been investigated. Small angle neutron scattering (SANS) and transmission electron microscopy (TEM) were employed to characterize the precipitates and their size distributions in Fe-0.047C-0.2V-1.6Mn (in wt.{\%}) alloy samples which had been austenitized, isothermally transformed at 700 °C for between 3 and 600 min and water quenched. TEM confirms that, following heat treatment, rows of vanadium-containing nanoscale interphase precipitates were present. Model-independent analysis of the nuclear SANS signal and model fitting calculations, using oblate spheroid and disc-shapes, were performed. The major axis diameter increased from 18 nm after 3 min to 35 nm after 600 min. Precipitate volume percent increased from 0.09 to 0.22 vol{\%} over the same period and number density fell from 2 × 1021 to 5 × 1020 m−3. A limited number of measurements of precipitate maximum diameters from TEM images showed the mean value increased from 8 nm after 5 min to 28 nm after 600 min which is in reasonable agreement with the SANS data.",
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    AU - Wang, Y.Q.

    AU - Clark, S.J.

    AU - Janik, V.

    AU - Heenan, R.K.

    AU - Venero, D. Alba

    AU - Yan, K.

    AU - McCartney, D.G.

    AU - Sridhar, Seetharaman

    AU - Lee, P.D.

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    PY - 2018/2/15

    Y1 - 2018/2/15

    N2 - Abstract Interphase precipitation (IPP) of nanoscale carbides in a vanadium-containing high-strength low-alloy steel has been investigated. Small angle neutron scattering (SANS) and transmission electron microscopy (TEM) were employed to characterize the precipitates and their size distributions in Fe-0.047C-0.2V-1.6Mn (in wt.%) alloy samples which had been austenitized, isothermally transformed at 700 °C for between 3 and 600 min and water quenched. TEM confirms that, following heat treatment, rows of vanadium-containing nanoscale interphase precipitates were present. Model-independent analysis of the nuclear SANS signal and model fitting calculations, using oblate spheroid and disc-shapes, were performed. The major axis diameter increased from 18 nm after 3 min to 35 nm after 600 min. Precipitate volume percent increased from 0.09 to 0.22 vol% over the same period and number density fell from 2 × 1021 to 5 × 1020 m−3. A limited number of measurements of precipitate maximum diameters from TEM images showed the mean value increased from 8 nm after 5 min to 28 nm after 600 min which is in reasonable agreement with the SANS data.

    AB - Abstract Interphase precipitation (IPP) of nanoscale carbides in a vanadium-containing high-strength low-alloy steel has been investigated. Small angle neutron scattering (SANS) and transmission electron microscopy (TEM) were employed to characterize the precipitates and their size distributions in Fe-0.047C-0.2V-1.6Mn (in wt.%) alloy samples which had been austenitized, isothermally transformed at 700 °C for between 3 and 600 min and water quenched. TEM confirms that, following heat treatment, rows of vanadium-containing nanoscale interphase precipitates were present. Model-independent analysis of the nuclear SANS signal and model fitting calculations, using oblate spheroid and disc-shapes, were performed. The major axis diameter increased from 18 nm after 3 min to 35 nm after 600 min. Precipitate volume percent increased from 0.09 to 0.22 vol% over the same period and number density fell from 2 × 1021 to 5 × 1020 m−3. A limited number of measurements of precipitate maximum diameters from TEM images showed the mean value increased from 8 nm after 5 min to 28 nm after 600 min which is in reasonable agreement with the SANS data.

    KW - Microalloyed steel

    KW - Precipitation

    KW - Small angle scattering

    KW - Transmission electron microscopy

    U2 - 10.1016/j.actamat.2017.11.032

    DO - 10.1016/j.actamat.2017.11.032

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    EP - 96

    JO - Acta Materialia

    JF - Acta Materialia

    SN - 1359-6454

    ER -