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Characterization of Inclusions in 3rd Generation Advanced High-Strength Steels
McMaster Univ, 1280 Main St West, Hamilton, ON L8S 4L7, Canada..
McMaster Univ, 1280 Main St West, Hamilton, ON L8S 4L7, Canada..
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.ORCID iD: 0000-0001-9775-0382
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2019 (English)In: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916, Vol. 50, no 4, p. 1674-1685Article in journal (Refereed) Published
Abstract [en]

Samples taken from laboratory-produced 3rd generation advanced high-strength steels, solidified at a low cooling rate, have been investigated to study the characteristics of non-metallic inclusions. Two steels, containing 2 and 5 pct Mn content, were produced for this purpose. A higher number of total inclusions were observed in 5 pct Mn steel. The four main types of inclusions observed were Al2O3, AlN, MnS, and AlSiMn-oxide. These classes were divided into subclasses according to variations in their chemistry. The major subclasses of AlN inclusions are either plate-like or regular in shape and have different size distributions. Thermodynamic calculations suggest that plate-like AlN inclusions are formed at the initial stage of solidification, while faceted/regular-shaped inclusions are precipitated toward the end of solidification. Moreover, it was found that the size of nitride inclusions is related to their N content. This phenomenon is discussed from the viewpoint of nucleation theory.

Place, publisher, year, edition, pages
Springer, 2019. Vol. 50, no 4, p. 1674-1685
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Metallurgy and Metallic Materials
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URN: urn:nbn:se:kth:diva-255553DOI: 10.1007/s11663-019-01605-0ISI: 000475698700016Scopus ID: 2-s2.0-85066623028OAI: oai:DiVA.org:kth-255553DiVA, id: diva2:1341331
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QC 20190808

Available from: 2019-08-08 Created: 2019-08-08 Last updated: 2019-08-08Bibliographically approved

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Karasev, AndreyJönsson, Pär G.

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