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Vanadium microalloying for ultra-high strength steel sheet treated by hot-dip metallising

Hutchinson, B, Martin, D, Karlsson, O, Lindberg, F, Thoors, H, Marceau, R and Taylor, A 2017, Vanadium microalloying for ultra-high strength steel sheet treated by hot-dip metallising, Materials science and technology, vol. 33, no. 4, pp. 497-506, doi: 10.1080/02670836.2016.1235841.

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Title Vanadium microalloying for ultra-high strength steel sheet treated by hot-dip metallising
Author(s) Hutchinson, B
Martin, D
Karlsson, O
Lindberg, F
Thoors, H
Marceau, RORCID iD for Marceau, R orcid.org/0000-0003-3612-8762
Taylor, A
Journal name Materials science and technology
Volume number 33
Issue number 4
Start page 497
End page 506
Total pages 10
Publisher Taylor & Francis
Place of publication Abingdon, Eng.
Publication date 2017
ISSN 1743-2847
Keyword(s) Sheet steel
Vanadium
Galvanising
Galvanealing
Strength
Ductility
Bendability
Microstructures
Science & Technology
Technology
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Materials Science
MARTENSITE
MICROSTRUCTURE
BEHAVIOR
HARDNESS
Summary Ultra-high strength steel sheets have been subjected to heat treatments that simulate the thermal cycles in hot-dip galvanising and galvannealing processes and evaluated with respect to their resulting mechanical properties and microstructures. The steels contained suitable contents of carbon (∼0.2%), manganese (1.2%) and chromium (0.4%) to ensure that they could be fully transformed to martensite after austenitisation followed by rapid cooling in a continuous annealing line, prior to galvanising. Different contents of vanadium (0–0.1%) and nitrogen (0.002–0.012%) were used to investigate the possible role of these microalloying elements on the strength of the tempered martensite. Vanadium, especially when in combination with a raised nitrogen content, helps to resist the effect of tempering so that a larger proportion of the initial strengthening is preserved after the galvanising cycle, giving tensile strength levels exceeding 1000 MPa. Different deoxidation practices using aluminium or silicon have also been included. These showed similar strength levels at corresponding carbon contents but the bendability of the Si-killed steel sheet was considerably superior. Microstructural examinations have been made on the annealed steels but the reason for the beneficial effect of vanadium is still not fully explained. It is concluded that microalloying with vanadium is a very promising approach in the development of corrosion-resistant ultra-high strength steel sheet products.
Language eng
DOI 10.1080/02670836.2016.1235841
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Taylor & Francis
Persistent URL http://hdl.handle.net/10536/DRO/DU:30086515

Document type: Journal Article
Collection: Institute for Frontier Materials
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