Print Email Facebook Twitter Structural tale of two novel (Cr,Mn)C carbides in steel Title Structural tale of two novel (Cr,Mn)C carbides in steel Author Tirumalasetty, G.K. Fang, C.M. Jansen, J. Yokosawa, T. Boeije, M.J.F. Sietsma, J. Van Huis, M.A. Zandbergen, H.W. Faculty Applied Sciences Department Quantum Nanoscience Date 2014-06-30 Abstract 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 have formed two distinct carbide phases possessing orthorhombic and monoclinic crystal structures. Density functional theory (DFT) 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 has 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. Subject (Cr,Mn)C carbidessteeltransmission electron microscopyelectron diffractionfirst principles calculations To reference this document use: http://resolver.tudelft.nl/uuid:d72a52b9-241b-466b-a658-a740137fb736 Source Manuscript Draft for Acta Materialia Part of collection Institutional Repository Document type journal article Rights (c)2014 The Authors Files PDF Manuscript_CrMnC_30062014.pdf 655.3 KB Close viewer /islandora/object/uuid:d72a52b9-241b-466b-a658-a740137fb736/datastream/OBJ/view