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of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

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Author: Ilian Atanasov

  • MATERIALS

    Strain controlled fatigue of 40X steel

    • Rumen Krastev
    • Tatiana Simeonova
    • Vasil Kavardjikov
    • Ilian Atanasov
    • Ludmil Drenchev
    Machines. Technologies. Materials., Vol. 16 (2022), Issue 4, pg(s) 146-149
    • Abstract
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    The fatigue strength of 40X steel at 25 oC was determined following ASTM E606M standard for strain-controlled tests. The studied experimental dependence was modelled with a power function as well as with the functions and coefficients described in the standard. The material expresses plastic properties for cyclic loadings above 0.2% strain amplitude.

  • TECHNOLOGIES

    Process flow problems and perspectives upon radioactive metal waste processing

    • Ilian Atanasov
    • Stoil Todorov
    Machines. Technologies. Materials., Vol. 15 (2021), Issue 4, pg(s) 153-154
    • Abstract
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    In the process of decommissioning of nuclear power facilities large metal waste quantities are generated which have to be processed in an appropriate manner. An optimal approach, adopted in a world-wide scale, is their meltdown at the final stage of treatment. Depending on the residual radioactive contamination, metal obtained thereafter may be directed for application in the industries, without limitations, or used on restricted purposes (production of radioactive waste containers, bio-protection means, etc.).

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