Weldable Structural Steels for Rotors of Cryogenerators

  • K. A. Yushchenko
  • V. I. Belotzerkovetz
  • O. G. Kvasnevskii
  • A. V. Shavel
Part of the Advances in Cryogenic Engineering Materials book series (ACRE, volume 28)

Abstract

During the next ten to fifteen years, there will probably be a transition to use of high power cryoelectrical machines. The first industrial cryogenerators are already being designed in some countries. The initial publications indicate that by 1984 or 1985 the first cryogenerators (with 300 MVA of power) will be placed on a test bed and put under pressure. This will be the intermediate step between extensive laboratory investigations and the actual use of superconductivity in cryoelectrical machines. Therefore, the choice and optimization of structural materials for rotors of cryogenerators is urgent. Owing to service conditions and safety considerations, the materials have especially strict requirements:
  • high strength at 293 K and sufficient brittle fracture resistance at 4.2 K;

  • fatigue loading resistance;

  • structural and property stability in magnetic fields;

  • resistivity to crack growth rate and large critical crack sizes preceding their metastable development;

  • good weldability, even for thick specimens, by all welding methods;

  • possibility of producing large bars by ordinary metallurgical manufacturing methods;

  • low magnetic susceptibility;

  • the least possible values of Young’s modulus and thermal expansion coefficient;

  • low susceptibility to stress concentration.

Keywords

Fatigue Nickel Welding Brittle Ductility 

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Copyright information

© Plenum Press, New York 1982

Authors and Affiliations

  • K. A. Yushchenko
    • 1
  • V. I. Belotzerkovetz
    • 1
  • O. G. Kvasnevskii
    • 1
  • A. V. Shavel
    • 1
  1. 1.E. O. Paton Institute of ElectroweldingUkr.SSR Academy of SciencesKievUSSR

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