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Frictional properties of copper and its alloys against JN 1 and JN 2 steels at 4 K under fretting condition.

[In Japanese. / En japonais.]

Author(s) : IWABUCHI A., IIDA S. I., ARAI H., KOMURO K., SUGIMOTO M., NAKAJIMA H., YOSHIDA K.

Type of article: Article

Summary

The friction resistance plays an important role to determine the amount of deflection between the wedges of toroidal coil cases of a nuclear fusion magnet under electromagnetic force, and the material combination showing high friction is required to reduce the deflection. In order to obtain the material exhibiting high friction against cryogenic structural steels, JN 1 and JN 2, at 4 K in liquid helium, five copper and its alloys including chromium coated copper were explored under fretting condition. Cupronickel showed the highest friction of all. However, it took more than 10,000 fretting cycles to show the high friction. Although the wear damage resulted from adhesive wear, the friction was not so high for other metals. It appeared that the friction was inversely proportional to hardness of the materials.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1993-1809
  • Languages: Japanese
  • Source: Cryogenics/ Cryog. Eng. - vol. 27 - n. 4
  • Publication date: 1992
  • Document available for consultation in the library of the IIR headquarters only.

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