CREEP RUPTURE PROPERTIES AND THEIR DEGRADATION OF HEAT RESISTANT 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

研究成果: Article査読

抄録

Creep rupture properties of heat resistant alloys with carbide or carbide and gamma prime precipitates were investigated in the temperature range from 900 degree C to 1050 degree C in He and reducing gas atmospheres. The degradation of the rupture strengths took place in the alloys, which have carbide as a strengthener, due to decarburization in He atmosphere at temperature higher than 1000 degree C. In the alloy which was strengthened mainly by gamma prime , the dissolution of gamma prime led to the degradation of the rupture strengths, but to the restoration of the rupture ductilities in greater extent. A new method to predict the rupture life, steady state creep rate, etc. from 0. 2% proof stress was proposed. In most cases, the method was found to be satisfactory in the sense that it represents the degradation behavior of the alloys according to various causes.

本文言語English
ページ(範囲)254-261
ページ数8
ジャーナルTransactions of National Research Institute for Metals (Tokyo)
27
4
出版ステータスPublished - 1985 12 1

ASJC Scopus subject areas

  • Engineering(all)

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