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Dispersion strengthening in vanadium microalloyed steels processed by simulated thin slab casting and direct charging. Part 2 - chemical characterisation of dispersion strengthening precipitates

Wilson, J.A. and Craven, A.J. and Li, Y. and Baker, T.N. (2007) Dispersion strengthening in vanadium microalloyed steels processed by simulated thin slab casting and direct charging. Part 2 - chemical characterisation of dispersion strengthening precipitates. Materials Science and Technology, 23 (5). pp. 519-527. ISSN 0267-0836

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Abstract

The composition of the sub-15 nm particles in six related vanadium high strength low alloy steels, made by simulated thin slab direct charged casting, has been determined using electron energy loss spectroscopy (EELS). Such particles are considered to be responsible for dispersion hardening. For the first time, particles down to 4 nm in size have had their composition fully determined. In all the steels, the particles were nitrogen and vanadium rich and possibly slightly sub-stoichiometric carbonitrides. Equilibrium thermodynamics predicted much higher carbon to metal atomic ratios than observed in all cases so that kinetics and mechanical deformation clearly control the precipitation process. Thus it is important to formulate the steel with this in mind.

Item type: Article
ID code: 5779
Keywords: low alloy steel, electron microscopy, spectroscopy, precipitation, direct charged process, material science, Mechanical engineering and machinery, Mining engineering. Metallurgy, Mechanics of Materials, Materials Science(all), Mechanical Engineering, Condensed Matter Physics
Subjects: Technology > Mechanical engineering and machinery
Technology > Mining engineering. Metallurgy
Department: Faculty of Engineering > Mechanical and Aerospace Engineering
Depositing user: Strathprints Administrator
Date Deposited: 31 Mar 2008
Last modified: 23 Jul 2015 14:26
URI: http://strathprints.strath.ac.uk/id/eprint/5779

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