Creep Properties with Short Period Excessive Loadings on a Nickel-Base Heat-Resistant Alloy Hastelloy XR

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概要

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• A series of constant load & temperature creep tests and constant temperature creep tests with short period excessive loadings was carried out on a nickel-base heat-resistant alloy Hastelloy XR, which was developed for applications in the High-Temperature Engineering Test Reactor (HTTR), at temperatures ranging from 900 to 1, 000°C. The excessive loading levels were set at the design stress intensity values Sm for Hastelloy XR indicated in the HTTR<BR>high-temperature structural design code. Five to six time excessive loadings did not cause significant changes of the minimum creep rate or the time to onset of tertiary creep. Excessive loadings repeated around ten times did not cause significant changes of the time to rupture or the rupture elongation. The results suggest that the design stress intensity values Sm for Hastelloy XR have been determined reasonably.

著者

• Tsuji Hirokazu

  Department Of Chemistry Faculty Of Science Okayama University Of Science

• NAKAJIMA Hajime

  Department of Materials Science and Engineering, Japan Atomic Energy Research Institute

• TANABE Tatsuhiko

  Third Research Group, National Research Institute for Metals

• NAKASONE Yuji

  Second Research Group, National Research Institute for Metals

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• Creep Properties with Short Period Excessive Loadings on a Nickel-Base Heat-Resistant Alloy Hastelloy XR
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