Structure and properties of κ-carbides in duplex lightweight steels

Lu, W. J.; Zhang, X. F. and Qin, R. S. (2015). Structure and properties of κ-carbides in duplex lightweight steels. Ironmaking & Steelmaking, 42(8) pp. 626–631.

DOI: https://doi.org/10.1179/1743281215Y.0000000007

Abstract

κ-carbide in lightweight steel is studied. Its thermal stability, crystal morphology, orientation relationship, degree of lattice misfit and mechanical properties are measured experimentally. The mechanisms for the microstructural evolution of κ-carbide are considered based on the crystal structure, lattice misfit, element diffusivity, and solute partition. The hard γ/κ grain and ductile α+κ grain provide an opportunity to develop the lightweight steels with desirable combination of mechanical properties.

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