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

doi:10.1016/j.actamat.2017.11.032

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

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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 language	English
Pages (from-to)	84-96
Number of pages	13
Journal	Acta Materialia
Volume	145
Early online date	1 Dec 2017
DOIs	https://doi.org/10.1016/j.actamat.2017.11.032
Publication status	Published - 15 Feb 2018

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

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10.1016/j.actamat.2017.11.032

Post-PrintAccepted author manuscript, 2.01 MBLicence: CC BY-NC-ND

Vit Janik
- Centre for E-Mobility and Clean Growth - Assistant Professor Academic
Person: Teaching and Research

Cite this

@article{312678c19168423bbae7d672ec5fdba6,

title = "Investigating nano-precipitation in a V-containing HSLA steel using small angle neutron scattering",

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.",

keywords = "Microalloyed steel, Precipitation, Small angle scattering, Transmission electron microscopy",

author = "Y.Q. Wang and S.J. Clark and V. Janik and R.K. Heenan and Venero, {D. Alba} and K. Yan and D.G. McCartney and Seetharaman Sridhar and P.D. Lee",

note = "NOTICE: this is the author{\textquoteright}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 {\textcopyright} 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ ",

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doi = "10.1016/j.actamat.2017.11.032",

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TY - JOUR

T1 - Investigating nano-precipitation in a V-containing HSLA steel using small angle neutron scattering

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.

N1 - 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/

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

M3 - Article

SN - 1359-6454

VL - 145

SP - 84

EP - 96

JO - Acta Materialia

JF - Acta Materialia

ER -

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

Abstract

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