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Azimuthal Deformation Particulars of Single-Crystal Cladding of High-Temperature Fuel Elements

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The particulars of the azimuthal deformation and the reasons for the formation of faceting on single-crystal molybdenum cladding with the <111> axis oriented longitudinally in tests for structural creep at 1650°C under internal argon gas pressure are investigated. It is shown that the periodic local nonuniformity of the azimuthal deformation of <111> cladding and the appearance of faceting are associated with the difference of the maximum shear stress in the active slip planes for single crystals with a bcc lattice in the range of orientations of the stretch axis <110>–<112>. Cladding sections located at the center of the interval <110>–<112> possess weak resistance to high-temperature creep and sites of deformation localization.

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Authors and Affiliations

  1. Luch Research Institute and Scientific Industrial Association (NII NPO Luch), Podolsk, Moscow Oblast, Russia

    A. A. Yastrebkov, V. I. Vybyvanets & B. N. Bespechalov

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  1. A. A. Yastrebkov
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  2. V. I. Vybyvanets
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  3. B. N. Bespechalov
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Translated from Atomnaya Énergiya, Vol. 116, No. 3, pp. 136–141, March, 2014.

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Yastrebkov, A.A., Vybyvanets, V.I. & Bespechalov, B.N. Azimuthal Deformation Particulars of Single-Crystal Cladding of High-Temperature Fuel Elements. At Energy 116, 174–180 (2014). https://doi.org/10.1007/s10512-014-9837-9

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  • DOI: https://doi.org/10.1007/s10512-014-9837-9

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