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Influence of Thermomechanical Working Schedules on Structure and Properties of HT-50 and HT-55 Superconductor Alloys

  • G. K. Zelenskiy
  • A. V. Arsent’ev
  • A. P. Golub’
  • V. E. Klepatsky
  • E. V. Nikulenkov
  • A. D. Nikulin
  • V. Ya. Fil’kin
  • V. S. Titov
  • P. P. Pashkov
  • V. A. Vasil’ev
  • A. I. Nikulin
Part of the An International Cryogenic Materials Conference Publication book series (ACRE, volume 36)

Abstract

The results of the staged critical current and structure determination are given for HT-50 and HT-55 superconductor wire specimens subjected to four intermediate anneals at 400°C. After the first anneal, Jc of both the alloys grows by more than an order of magnitude which is related to an intergranular and, in the case of HT-55 alloy, also an intragranular α-phase precipitation. Subsequent deformation cycles of thermomechanical working (TMW) effect an increaseof Jc, a decrease of α-phase and β-matrix subgrain sizes, while intermediate anneals have an opposite effect. An increase of Jc is observed at the final stage of drawing. The specimens of HT-50 and HT-55 alloys have, respectively, Jc = 3.2×105 A/cm2 and 3.9×10 A/cm5 A/cm2 in a field of 5T. The value is shown to depend on the size of β-matrix subgrains, the boundaries of which are decorated with α-particles.

Keywords

Critical Current Density Subgrain Size Intermediate Anneal Final Deformation Superconductor Wire 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1990

Authors and Affiliations

  • G. K. Zelenskiy
    • 1
  • A. V. Arsent’ev
    • 1
  • A. P. Golub’
    • 1
  • V. E. Klepatsky
    • 1
  • E. V. Nikulenkov
    • 1
  • A. D. Nikulin
    • 1
  • V. Ya. Fil’kin
    • 1
  • V. S. Titov
    • 1
    • 2
  • P. P. Pashkov
    • 1
    • 2
  • V. A. Vasil’ev
    • 1
    • 3
  • A. I. Nikulin
    • 1
    • 3
  1. 1.A. A. Bochvar’s All Union Scientific Research Institute of Inorganic MaterialsMoscowUSSR
  2. 2.All Union Scientific Research Institute of ElectromechanicsMoscowUSSR
  3. 3.Institute of High Energy PhysicsSerpukhovUSSR

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