Effect of microstructure on creep resistance of hastelloy X

Yomei Yoshioka; Daizo Saito; Kazumari Fujiyama; Nagatoshi Okabe

doi:10.2355/tetsutohagane1955.80.10_789

Effect of microstructure on creep resistance of hastelloy X

Yomei Yoshioka, Daizo Saito, Kazumari Fujiyama, Nagatoshi Okabe

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

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 (V_o) and aged (V) conditions, area fraction of intergranular precipitates (ρ) applied stress (σ), aging temperature (T_a), test temperature (T), and activation energy of aging (Q_a and creep (Q_c).

Original language	English
Pages (from-to)	789-794
Number of pages	6
Journal	Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume	80
Issue number	10
DOIs	https://doi.org/10.2355/tetsutohagane1955.80.10_789
Publication status	Published - 1994
Externally published	Yes

ASJC Scopus subject areas

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

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AU - Saito, Daizo

AU - Fujiyama, Kazumari

AU - Okabe, Nagatoshi

PY - 1994

Y1 - 1994

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AB - 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).

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Effect of microstructure on creep resistance of hastelloy X

Abstract

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