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Inclusion and Microstructure Characteristics in Steels with TiN Additions
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy.ORCID iD: 0000-0003-0533-6729
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
2016 (English)In: Steel Research International, ISSN 1611-3683, E-ISSN 1869-344X, Vol. 87, no 3, 339-348 p.Article in journal (Refereed) Published
Abstract [en]

The quantitative analysis of inclusion and microstructure characteristics in the steels with TiN additions has been studied. The typical inclusion was detected to be a TiN+Mn-Al-Si-Ti-O+MnS phase. This identification was based on the measurements of scanning electron microscopy with energy-dispersive X-ray spectrometer (SEM-EDS), electron probe microanalysis (EPMA), which equipped wavelength-dispersive X-ray spectroscopy (WDS), and equilibrium calculations by using the commercial software Thermo-Calc. TiN was found to be the effective nucleation site for the formation of intragranular ferrite (IGF). Furthermore, the increased inclusion size led to the increased probability of IGF nucleation. In addition, this probability of IGF nucleation was slightly decreased with the increased sulfur content. This tendency could fit the tendency of the area fraction of IGF in the steels containing different sulfur contents.

Place, publisher, year, edition, pages
John Wiley & Sons, 2016. Vol. 87, no 3, 339-348 p.
Keyword [en]
Inclusion size, Intragranular ferrite, Nucleation, Sulfur, Titanium nitride, Dispersion (waves), Electron probe microanalysis, Ferrite, Manganese, Microstructure, Scanning electron microscopy, Spectrometers, Ternary systems, Titanium compounds, Wavelength dispersive spectroscopy, X ray spectrometers, X ray spectroscopy, Commercial software, Energy dispersive x-ray spectrometers, Equilibrium calculation, Inclusion sizes, Intra-granular ferrites, Microstructure characteristics, Nucleation sites, Wavelength dispersive X-ray spectroscopies
National Category
Materials Engineering
URN: urn:nbn:se:kth:diva-176205DOI: 10.1002/srin.201500061ISI: 000371504300008ScopusID: 2-s2.0-84959519893OAI: diva2:873120

QC 20151123. QC 20160407

Available from: 2015-11-23 Created: 2015-11-02 Last updated: 2016-04-07Bibliographically approved

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Mu, WangzhongJönsson, Pär GöranNakajima, Keiji
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