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., Craven, A.J., 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), 519-527(9).

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Abstract

The compositions of sub-15 nm particles in six related vanadium high strength low alloy steels, made by simulated thin slab direct charged casting, have 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 substoichiometric 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:Articles
Keywords:High strength low alloy (HSLA) steel, analytical electron microscopy, electron energy loss spectroscopy, precipitation, thin slab direct charged process.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Craven, Professor Alan
Authors: Wilson, J.A., Craven, A.J., Li, Y., and Baker, T.N.
Subjects:T Technology > T Technology (General)
Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Materials Science and Technology
ISSN:1743-2847

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