Prediction of intragranular ferrite nucleation from TiO, TiN, and VN inclusions
2016 (English)In: Journal of Materials Science, ISSN 0022-2461, E-ISSN 1573-4803, Vol. 51, no 4, 2168-2180 p.Article in journal (Refereed) PublishedText
The current study presents a method to calculate the critical diameters of TiO, TiN, and VN inclusions for intragranular ferrite (IGF) nucleation in steels. Based on the calculation results, it was noted that the critical diameters of TiO, TiN, and VN inclusions for IGF nucleation were 0.192, 0.355, and 0.810 μm. The calculation results agreed with the experiment data of a minimum inclusion size for IGF nucleation in the actual steel samples. Moreover, the effects of Mn, C, and S contents on the critical diameters of inclusions were investigated. It was found that the critical diameters of TiO, TiN, and VN inclusions increased with the increasing Mn and C contents. In addition, it was found that S does not have a direct effect on the critical diameters of TiO, TiN, and VN inclusions. However, the increasing S content led to an increased amount of MnS precipitation in the actual steels. This is negative, since MnS is ineffective nucleation site for IGF nucleation. When the amount of MnS increases in steels, the area fraction of IGF slightly decreases. This fact has been investigated by in situ observation experiments.
Place, publisher, year, edition, pages
Springer-Verlag New York, 2016. Vol. 51, no 4, 2168-2180 p.
C-MN STEEL, HEAT-AFFECTED ZONE, LOW-ALLOY STEEL, ACICULAR FERRITE, NONMETALLIC INCLUSIONS, MICROSTRUCTURE CONTROL, INTERFACIAL ENERGY, SULFUR-CONTENT, WELD METALS, OXIDE
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-180938DOI: 10.1007/s10853-015-9527-6ISI: 000367647100050ScopusID: 2-s2.0-84953359525OAI: oai:DiVA.org:kth-180938DiVA: diva2:897595
QC 20160126. QC 201602052016-01-262016-01-252016-02-05Bibliographically approved