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Mechanical and Electrical Testing of Composite Aluminum Cryoconductors

  • K. T. Hartwig
  • R. J. DeFrese
Part of the An International Cryogenic Materials Conference Publication book series (ACRE, volume 36)

Abstract

Results are reported of monotonic and cyclic-strain resistivity experiments at 4.2 and 20 K on Alcoa fabricated composite aluminum cryoconductors. The conductors contain filaments of nominal 99.999% pure aluminum in an Al-Fe-Ce matrix. Initial conductor resistance ratios (RR = R(273 K)/R(T)) range from 340 to 800 at 4.2 K and from 259 to 500 at 20 K. Sample resistivity increases nearly linearly with monotonie plastic strain at a rate of 7 ± 2 nΩcm / % strain. Force controlled cyclic loadings cause the resistivity to increase rapidly to a saturation value reached after about 500 cycles.

Keywords

Plastic Strain Pure Aluminum Resistance Ratio Composite Conductor Wire Sample 
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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References

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Copyright information

© Plenum Press, New York 1990

Authors and Affiliations

  • K. T. Hartwig
    • 1
  • R. J. DeFrese
    • 1
  1. 1.Department of Mechanical EngineeringTexas A&M UniversityCollege StationUSA

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