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Tensile and impact properties changes of HASTELLOY X after exposure in high-temperature helium environment

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Abstract

Experimental results are presented on the changes in mechanical properties of HASTELLOY X* after being used in the liner tube of HENDEL hot gas duct under high temperature helium gas for about 6000 hours. In both room and elevated-temperature tensile tests, 0.2 pct proof stress and total elongation were significantly decreased after exposure in high temperature helium. Room-temperature impact toughness of the exposed specimens exhibited a much lower absorbed energy (about 5.0 × 106 J/m2) than that of unexposed specimens (about 1.5 × 106 J/m2). The fracture modes of tensile test specimens were more closely correlated with the test temperature than with the long-time exposure; however, long-time exposure is more affected by the tensile strength of HASTELLOY X than the test temperature. Moreover, “downstream effect” for the carbide precipitation reaction occurred in the liner tube of the HENDEL hot gas duct.

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Authors and Affiliations

  1. Department of High Temperature Engineering, Tokai Research Establishment, Japan Atomic Energy Research Institute, Tokai-Mura, Naka-Gun, Ibaraki-Ken, 319-11, Japan

    Yasuo Kondo (Research Engineers), Kiyoshi Fukaya (Chief), Kazuhiko Kunitomi (Research Engineers) & Yoshiaki Miyamoto (Head and Principal Engineer)

Authors
  1. Yasuo Kondo
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  2. Kiyoshi Fukaya
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  3. Kazuhiko Kunitomi
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  4. Yoshiaki Miyamoto
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HASTELLOY is a trademark of Cabot Corporation.

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Kondo, Y., Fukaya, K., Kunitomi, K. et al. Tensile and impact properties changes of HASTELLOY X after exposure in high-temperature helium environment. Metall Trans A 19, 1269–1275 (1988). https://doi.org/10.1007/BF02662588

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  • DOI: https://doi.org/10.1007/BF02662588

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