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Preparation and Investigation of Structural Parameters of Single Crystals of Low-Alloyed Alloys on the Base of Tungsten and Molybdenum

Authors

  • Katerina Skotnicova,

    Corresponding author
    • Faculty of Metallurgy and Materials Engineering, VŠB – Technical University of Ostrava, Regional Materials Science and Technology Centre, Av. 17. listopadu 15, 70833 Ostrava-Poruba, Czech Republic
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  • Valentina Mikhailovna Kirillova,

    1. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninski prospect 49, 119991 Moscow, Russian Federation
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  • Jaromir Drapala,

    1. Faculty of Metallurgy and Materials Engineering, VŠB – Technical University of Ostrava, Regional Materials Science and Technology Centre, Av. 17. listopadu 15, 70833 Ostrava-Poruba, Czech Republic
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  • Gennadij Sergeevich Burkhanov,

    1. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninski prospect 49, 119991 Moscow, Russian Federation
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  • Vladimir Alekseevch Kuz'mishev,

    1. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninski prospect 49, 119991 Moscow, Russian Federation
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  • Vladislav Vladimirovich Sdobyrev,

    1. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninski prospect 49, 119991 Moscow, Russian Federation
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  • Vladimir Arkadievich Dementyev,

    1. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninski prospect 49, 119991 Moscow, Russian Federation
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  • Nikolai Nikiolaievich Abramov

    1. Moscow Institute for Steel and Alloys (NITU “MISiS”), Moscow, Russian Federation
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  • This paper was created within the frame of the project No. CZ.1.05/2.1.00/01.0040 “Regional Materials Science and Technology Centre” within the frame of the operation programme “Research and Development for Innovations” financed by the Structural Funds and from the state budget of the Czech Republic.

Faculty of Metallurgy and Materials Engineering, VŠB – Technical University of Ostrava, Regional Materials Science and Technology Centre, Av. 17. listopadu 15, 70833 Ostrava-Poruba, Czech Republic.

Abstract

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Lower structural perfection of W-Ta single crystals is associated with considerable disturbance of the melt by plasma arc, great temperature gradients and cooling rate of the growing single crystal due to “air rinsing” of its surface by plasma-forming gas. In the peripheral areas of this sample a large number of small sub-grains is presented, which confirms the trend towards fragmentation of the structure at crystallization from the beginning to the end of the ingot.

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