Influence of high-temperature exposure on the microstructure and creep resistance of IN-100 superalloy

Optical and electron microscopy together with stress rupture life tests were performed to study the effect of high-temperature exposure on the morphology and distribution of the γ′ phase in IN-100 superalloy. Annealing near the solvus temperature for the γ′ phase has a strong effect on microstructur...

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Bibliographic Details
Published in:Materials characterization 1993, Vol.30 (1), p.3-12
Main Authors: JOVANOVIC, M. T, TADIC, S
Format: Article
Language:English
Subjects:
Applied sciences
Cold working, work hardening
annealing, quenching, tempering, recovery, and recrystallization
textures
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Metals. Metallurgy
Physics
Treatment of materials and its effects on microstructure and properties
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Summary:Optical and electron microscopy together with stress rupture life tests were performed to study the effect of high-temperature exposure on the morphology and distribution of the γ′ phase in IN-100 superalloy. Annealing near the solvus temperature for the γ′ phase has a strong effect on microstructure. The relationship between variations in the fraction of the γ′ phase Wγ′, and creep resistance has been established. Wγ, decreases with annealing temperature because of dissolution of γ′ particles in the γ matrix. Decreased creep resistance of annealed samples is ascribed to the lower Wγ′. The difference in creep resistance between samples with the same Wγ′ is a consequence of microstructural degeneration during high-temperature exposure.
ISSN:1044-5803
1873-4189
DOI:10.1016/1044-5803(93)90003-E