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Quantitative examination of carbide and sulphide precipitates in chemically complex steels processed by direct strip casting

Dorin, Thomas, Wood, Kathleen, Taylor, Adam, Hodgson, Peter and Stanford, Nicole 2016, Quantitative examination of carbide and sulphide precipitates in chemically complex steels processed by direct strip casting, Materials characterization, vol. 112, pp. 259-268, doi: 10.1016/j.matchar.2015.12.028.

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Title Quantitative examination of carbide and sulphide precipitates in chemically complex steels processed by direct strip casting
Author(s) Dorin, ThomasORCID iD for Dorin, Thomas orcid.org/0000-0002-1033-961X
Wood, Kathleen
Taylor, Adam
Hodgson, Peter
Stanford, Nicole
Journal name Materials characterization
Volume number 112
Start page 259
End page 268
Total pages 10
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2016-02
ISSN 1044-5803
1873-4189
Summary A high strength low alloy steel composition has been melted and processed by two different routes: simulated direct strip casting and slow cooled ingot casting. The microstructures were examined with scanning and transmission electron microscopy, atom probe tomography and small angle neutron scattering (SANS). The formation of cementite (Fe3C), manganese sulphides (MnS) and niobium carbo-nitrides (Nb(C,N)) was investigated in both casting conditions. The sulphides were found to be significantly refined by the higher cooling rate, and developed an average diameter of only 100 nm for the fast cooled sample, and a diameter too large to be measured with SANS in the slow cooled condition (> 1.1 μm). Slow cooling resulted in the development of classical Nb(C,N) precipitation, with an average diameter of 7.2 nm. However, after rapid cooling both the SANS and atom probe tomography data indicated that the Nb was retained in the matrix as a random solid solution. There was also some evidence that O, N and S are also retained in solid solution in levels not found during conventional processing.
Language eng
DOI 10.1016/j.matchar.2015.12.028
Field of Research 020402 Condensed Matter Imaging
091207 Metals and Alloy Materials
0912 Materials Engineering
0913 Mechanical Engineering
Socio Economic Objective 861103 Basic Iron and Steel Products
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30084936

Document type: Journal Article
Collection: Institute for Frontier Materials
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