Effect of microstructure on creep resistance of hastelloy X

Yomei Yoshioka, Daizo Saito, Kazumari Fujiyama, Nagatoshi Okabe

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The primary objective of these study is to clarify the effect of microstructural changes in minimum creep rate and rupture life of Hastelloy X, and is also to develop the creep life predicted method from microstructural observation and the component operating history. Results showed that 1) the amount of intergranular and intragranular precipitates increases during the aging under 750°-900°C. The first provides strength to creep resistance and the second weakens it, 2) minimum creep rate was explain as functions of volume fraction of precipitates at the as-solutioned (Vo) and aged (V) conditions, area fraction of intergranular precipitates (ρ) applied stress (σ), aging temperature (Ta), test temperature (T), and activation energy of aging (Qa and creep (Qc).

Original languageEnglish
Pages (from-to)789-794
Number of pages6
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Issue number10
Publication statusPublished - 1994
Externally publishedYes

ASJC Scopus subject areas

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


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