CREEP RUPTURE PROPERTIES OF Ni-Cr-W ALLOYS FOR NUCLEAR STEEL MAKING IN HELIUM AND REDUCING GAS ATMOSPHERES.

Tatsuhiko Tanabe, Tatsuo Shikama, Yoshikazu Sakai, Masakazu Fujitsuka, Hiroshi Araki, Heitaro Yoshida, Ryoji Watanabe

Research output: Contribution to journalArticle

Abstract

Creep rupture properties of alloys which precipitate alpha -W were investigated in the temperature range from 900 degree C to 1050 degree C in He environment which simulates the primary coolant of high temperature gas cooled reactor and at 900 degree C in a reducing gas environment to be used when direct steelmaking is connected with the primary HTGR. The results are discussed in terms of carburization, decarburization and oxidation. Two alloys have the possibility of a 50,000 h rupture strength of more than 1 kg/mm**2. Degradation of rupture strength in an alloy which has alpha -W as the main strengthener did not appear in spite of severe decarburization.

Original languageEnglish
Pages (from-to)2045-2051
Number of pages7
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume69
Issue number16
DOIs
Publication statusPublished - 1983 Jan 1

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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