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

J.A. Wilson, A.J. Craven, Y. Li, T.N. Baker

Research output: Contribution to journalArticle

8 Citations (Scopus)

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.
LanguageEnglish
Pages519-527
Number of pages8
JournalMaterials Science and Technology
Volume23
Issue number5
DOIs
Publication statusPublished - May 2007

Fingerprint

dispersion strengthening
Vanadium
Steel
vanadium
charging
Precipitates
precipitates
Casting
slabs
Dispersion hardening
steels
high strength steels
Carbon nitride
Electron energy loss spectroscopy
Chemical analysis
High strength steel
Nitrogen
Carbon
Metals
Thermodynamics

Keywords

  • low alloy steel
  • electron microscopy
  • spectroscopy
  • precipitation
  • direct charged process
  • material science

Cite this

@article{3f52557ed0884be990215fce7db49f9a,
title = "Dispersion strengthening in vanadium microalloyed steels processed by simulated thin slab casting and direct charging. Part 2 - chemical characterisation of dispersion strengthening precipitates",
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.",
keywords = "low alloy steel, electron microscopy, spectroscopy, precipitation, direct charged process, material science",
author = "J.A. Wilson and A.J. Craven and Y. Li and T.N. Baker",
year = "2007",
month = "5",
doi = "10.1179/174328407X161330",
language = "English",
volume = "23",
pages = "519--527",
journal = "Materials Science and Technology",
issn = "0267-0836",
number = "5",

}

TY - JOUR

T1 - Dispersion strengthening in vanadium microalloyed steels processed by simulated thin slab casting and direct charging. Part 2 - chemical characterisation of dispersion strengthening precipitates

AU - Wilson, J.A.

AU - Craven, A.J.

AU - Li, Y.

AU - Baker, T.N.

PY - 2007/5

Y1 - 2007/5

N2 - 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.

AB - 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.

KW - low alloy steel

KW - electron microscopy

KW - spectroscopy

KW - precipitation

KW - direct charged process

KW - material science

U2 - 10.1179/174328407X161330

DO - 10.1179/174328407X161330

M3 - Article

VL - 23

SP - 519

EP - 527

JO - Materials Science and Technology

T2 - Materials Science and Technology

JF - Materials Science and Technology

SN - 0267-0836

IS - 5

ER -