Wang, YQ;
Clark, SJ;
Janik, V;
Heenan, RK;
Venero, DA;
Yan, K;
McCartney, DG;
... Lee, PD; + view all
(2017)
Investigating nano-precipitation in a V-containing HSLA steel using small angle neutron scattering.
Acta Materialia
, 145
pp. 84-96.
10.1016/j.actamat.2017.11.032.
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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.
| Type: | Article |
|---|---|
| Title: | Investigating nano-precipitation in a V-containing HSLA steel using small angle neutron scattering |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.actamat.2017.11.032 |
| Publisher version: | https://doi.org/10.1016/j.actamat.2017.11.032 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Technology, Materials Science, Multidisciplinary, Metallurgy & Metallurgical Engineering, Materials Science, Microalloyed steel, Precipitation, Small angle scattering, Transmission electron microscopy, NANOMETER-SIZED CARBIDES, LOW-CARBON STEELS, MO MICROALLOYED STEELS, DUAL-PHASE STEELS, LOW-ALLOY STEELS, INTERPHASE PRECIPITATION, FERRITE TRANSFORMATION, TENSILE BEHAVIOR, COOLING RATE, SHEET STEEL |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10049190 |
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