Characterization of nano-scale particles in hot-rolled, high strength low alloy steels (HSLA)

Timokhina, Ilana, Hodgson, Peter, Ringer, S., Zheng, R. and Pereloma, E. 2007, Characterization of nano-scale particles in hot-rolled, high strength low alloy steels (HSLA), Materials science forum, vol. 561-565, pp. 2083-2086.

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Title Characterization of nano-scale particles in hot-rolled, high strength low alloy steels (HSLA)
Author(s) Timokhina, IlanaORCID iD for Timokhina, Ilana
Hodgson, Peter
Ringer, S.
Zheng, R.
Pereloma, E.
Journal name Materials science forum
Volume number 561-565
Start page 2083
End page 2086
Publisher Trans Tech Publications
Place of publication Uetikon-Zuerich, Switzerland
Publication date 2007-10-02
ISSN 0255-5476
Keyword(s) high strength low alloy steels
atom probe tomography
transmission electron microscopy
yield strength
precipitation hardening
Summary The contribution of nano-scale particles observed using Atom Probe Tomography in an increase of yield strength of conventional and advanced HSLA steels was studied. The advanced HSLA steel showed higher yield strength than conventional HSLA steel. There were two types of carbides, which primarily contribute to an increase in yield strength of conventional HSLA steel: (i) coarse TiC with average size of 25±5nm and (ii) fine TiC with average radius of 3±1.2nm. The presence of two types of carbides was found in the microstructure of advanced HSLA steel: (i)
nano-scale Ti0.98Mo0.02C0.6 carbides with average radius of 2.2±0.5nm, and (ii) C19Cr7Mo24 particles with an average radius of 1.5±0.3nm. The contribution of precipitation hardening in the yield strength of advanced HSLA steel due to the nano-scale particles was 174MPa, while this value in the conventional HSLA steel was 128MPa.
Language eng
Field of Research 091207 Metals and Alloy Materials
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2007, Trans Tech Publications
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Collections: Centre for Material and Fibre Innovation
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