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Investigating nano-precipitation in a V-containing HSLA steel using small angle neutron scattering
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Wang, Y. Q., Clark, Samuel, Janik, Vit, Heenan, R. K., Venero, D. Alba, Yan, K., McCartney, D. G., Sridhar, S. and Lee, P. D. (2018) Investigating nano-precipitation in a V-containing HSLA steel using small angle neutron scattering. Acta Materialia, 145 . pp. 84-96. doi:10.1016/j.actamat.2017.11.032
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Official URL: https://doi.org/10.1016/j.actamat.2017.11.032
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.
| Item Type: | Journal Article | ||||||||||||||||||
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| Subjects: | T Technology > TN Mining engineering. Metallurgy | ||||||||||||||||||
| Divisions: | Faculty of Science > WMG (Formerly the Warwick Manufacturing Group) | ||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Steel alloys, Microalloying, Small-angle scattering, Transmission electron microscopy | ||||||||||||||||||
| Journal or Publication Title: | Acta Materialia | ||||||||||||||||||
| Publisher: | Pergamon-Elsevier Science Ltd | ||||||||||||||||||
| ISSN: | 1359-6454 | ||||||||||||||||||
| Official Date: | 15 February 2018 | ||||||||||||||||||
| Dates: |
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| Volume: | 145 | ||||||||||||||||||
| Page Range: | pp. 84-96 | ||||||||||||||||||
| DOI: | 10.1016/j.actamat.2017.11.032 | ||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||
| RIOXX Funder/Project Grant: |
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