The article considers linear substructures of close-packed metals represented by helical packings of universal building units (tetrablocks) united over faces, i.e. seven-vertex unions of four tetrahedra over faces. The implementation of such helical packings is demonstrated for cubic crystals of α- and β-manganese as an example.
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Acknowledgement
This research was supported by the Russian Foundation for Basic Research (Grant No. 19-02-00085). Symmetry regularities of the possible structure of close-packed tetrahedral structures were established with the support of the Ministry of Science and Higher Education of the Russian Federation using the electronic scientific resources of A. N. Nesmeyanov Institute of Elementorganic Compounds of the Russian Academy of Sciences (construction of structural models as geometric implementations of mathematical structures) and N. E. Bauman Moscow State Technical University (comparison of models with experimental data and computer simulation).
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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 49 – 54, March, 2022.
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Talis, A.L., Everstov, A.A. & Kraposhin, V.S. Helical Substructures of Close-Packed Metals Determined by a Universal Building Unit (Tetrablock). Met Sci Heat Treat 64, 183–188 (2022). https://doi.org/10.1007/s11041-022-00792-z
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DOI: https://doi.org/10.1007/s11041-022-00792-z