Inorganic Materials: Applied Research

, Volume 1, Issue 3, pp 206–211 | Cite as

Features of forming the structure of pseudo single crystals of Kh18AG20 steel

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Abstract

Crystallographic laws governing the formation of the structure of single crystals of nitrogen-bearing high-alloy Kh18AG20 steel during the δ → γ(bcc → fcc) polymorphic transformation were studied using the methods of metallography, X-ray diffraction, and transmission electron microscopy. A two-phase pseudo single crystal with nearly equally proportioned structural constituents was obtained from the initial ferrite single crystal of nitrogen-bearing high-alloy Kh18AG20 steel at room temperature. It was established that austenite was precipitated from ferrite by a crystallographically ordered mechanism according to orientation relationships similar to those proposed by Kurdjumov and Sachs for the γ and α phases. Six crystallographic austenite orientations were realized in the volume of a pseudo single crystal.

Key words

pseudo single crystal polymorphic transformation orientation relationships X-ray diffraction analysis ferrite austenite 

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© Pleiades Publishing, Ltd. 2010

Authors and Affiliations

  1. 1.Institute of Metal Physics, Ural BranchRussian Academy of SciencesYekaterinburgRussia

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