Plastic deformation and fracture of niobium reinforced with tungsten fibers

  • V. I. Trefilov
  • D. M. Karpinos
  • L. I. Tuchinskii
  • V. F. Moiseev
  • M. L. Gorb
  • L. R. Vishnyakov
  • É. P. Pechkovskii
  • A. D. Vastl'ev
  • V. A. Kokhanyi
Test Methods and Properties of Materials
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Conclusions

  1. 1.

    An investigation into the temperature dependence of the strength of a niobium/tungsten-wire composite, which constitutes a typical ductile-matrix/ductile-fiber system, has shown that at high temperature (> 1000°C) there is a discrepancy between the experimentally determined strength of the composite and values of strength calculated with the additive equation.

     
  2. 2.

    The extra strength of the composite is due to a “plasticizing” influence exerted by the niobium matrix on the tungsten fibers, as a result of which the latter undergo additional strain strengthening.

     
  3. 3.

    Fractographic examinations revealed that the rupture of a Nb/W composite is preceded by substantial local plastic deformation of its components.

     

Keywords

Tungsten Plastic Deformation Niobium Local Plastic Additive Equation 

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Literature cited

  1. 1.
    T. Tietz and J. Wilson, Refractory Metals and Alloys [Russian translation], Metallurgiya, Moscow (1969).Google Scholar
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    M. V. Zakharov and A. M. Zakharov, Heat Resisting Alloys [in Russian], Metallurgiya, Moscow (1972).Google Scholar
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    Rypzo Tajime, The Tensile Strength of Tungsten Wires at High Temperature, Hantaro Nagaoka An-niversary Volume, Tokyo (1952).Google Scholar
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    H. S. Hollister and K. Thomas, Fiber-Reinforced Materials [Russian translation], Metallurgiya, Moscow (1969).Google Scholar
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    K. D. Beacham, in: Rupture [Russian translation], Vol. 1, Mir, Moscow (1973).Google Scholar

Copyright information

© Plenum Publishing Corporation 1976

Authors and Affiliations

  • V. I. Trefilov
    • 1
    • 2
  • D. M. Karpinos
    • 1
    • 2
  • L. I. Tuchinskii
    • 1
    • 2
  • V. F. Moiseev
    • 1
    • 2
  • M. L. Gorb
    • 1
    • 2
  • L. R. Vishnyakov
    • 1
    • 2
  • É. P. Pechkovskii
    • 1
    • 2
  • A. D. Vastl'ev
    • 1
    • 2
  • V. A. Kokhanyi
    • 1
    • 2
  1. 1.Institute of Materials ScienceAcademy of Sciences of the Ukrainian SSRUSSR
  2. 2.E. O. Paton Institute of ElectroweldingAcademy of Sciences of the Ukrainian SSRUSSR

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