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Strengthening of nickel -base superalloys for nuclear heat exchanger application

Abstract

Strengthening mechanisms of nickel-base superalloys have been discussed with the background of the Japanese research and development activities in this field. As candidates for materials of intermediate heat exchangers which will be used for a future programme of nuclear steelmaking systems, two kinds of alloys have successfully been developed in Japan. The designs of these alloys have been reviewed from metallurgical aspects including their composition and creep properties. In addition to the conventional methods to strengthen these alloys, such as solid solution hardening or particle precipitation hardening, a grain-boundary precipitation strengthening due to tungsten-rich α2 phase in the Ni-Cr-W system, would be expected as a further advanced method.

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Matsuo, T., Ueki, M., Takeyama, M. et al. Strengthening of nickel -base superalloys for nuclear heat exchanger application. J Mater Sci 22, 1901–1907 (1987). https://doi.org/10.1007/BF01132914

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Keywords

  • Precipitation
  • Nickel
  • Heat Exchanger
  • Solution Hardening
  • Development Activity