Structural tale of two novel (Cr, Mn)C carbides in steel
| Autor: | Tirumalasetty, G. K., Fang, C. M., Jansen, J., Yokosawa, T., Boeije, M. F J, Sietsma, J., Van Huis, M. A., Zandbergen, H. W., Debye Institute, Soft Condensed Matter and Biophysics, Sub Soft Condensed Matter, Sub Instrumentatie RESO |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Polymers and Plastics Alloy chemistry.chemical_element Manganese engineering.material Carbide Chromium chemistry.chemical_compound Electron diffraction Electronic Optical and Magnetic Materials Mn)C carbides Cementite Metallurgy Metals and Alloys (Cr (Cr Mn)C carbides Electronic Optical and Magnetic Materials Crystallography chemistry Steel engineering Ceramics and Composites Orthorhombic crystal system TRIP Steel Transmission electron microscopy First principles Ternary operation First principles calculations Monoclinic crystal system |
| Zdroj: | Tirumalasetty, G, Tirumalasetty, G K, Fang, C M, Jansen, J, Yokosawa, T, Boeije, M F J, Sietsma, J, Van Huis, M A & Zandbergen, H W 2014, ' Structural tale of two novel (Cr, Mn)C carbides in steel ', Acta Materialia, vol. 78, pp. 161-172 . https://doi.org/10.1016/j.actamat.2014.06.035 Acta Materialia, 78, 161. Elsevier Limited |
| ISSN: | 1359-6454 |
| DOI: | 10.1016/j.actamat.2014.06.035 |
| Popis: | Chromium (Cr), manganese (Mn) and carbon (C) are well known alloying elements used in technologically important alloy steels and advanced high strength steels. It is known that binary CrCx and MnCx carbides can be formed in steels, but in this study we reveal for the first time that Cr and Mn were found combined in novel ternary cementite type (Cr, Mn)C carbides. Electron diffraction experiments showed that Cr, Mn and C formed two distinct carbide phases possessing orthorhombic and monoclinic crystal structures. Density functional theory calculations were performed on these phases and excellent agreement was found between calculations and experiments on the lattice parameters and relative atomic positions. The calculations showed that the combination of Mn and Cr resulted in a very high thermodynamic stability of the (Cr, Mn)C carbides, and that local structural relaxations are associated with carbon additions. Possible implications of these ternary carbides for novel applications in steel design and manufacturing are discussed. © 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
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