Characteristic fatigue-creep life map of a Fe-Ni-Cr alloy melted in vacuum and in air at high temperature

Smooth round specimens were cut from a large ESR cast-to-shape gas turbine disc (ECD) of a Fe-28Ni-14Cr alloy with a characteristic structure of coarse-branch crystal melted in vacuum and in air, respectively. The specimens were heat-treated according to a schedule of 1050DGC/4 hr, cooling in oil; a...

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Bibliographic Details
Published inJournal of materials science Vol. 39; no. 10; pp. 3469 - 3470
Main Author He, Qingfu
Format Journal Article
LanguageEnglish
Published Heidelberg Springer 15.05.2004
Springer Nature B.V
Subjects
Applied sciences
Creep life
Exact sciences and technology
Fatigue
Ferrous alloys
High temperature
Materials science
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Nickel chromium alloys
Lifetime
Creep
Chromium alloy
Mechanical properties
Fatigue
Nickel alloy
Iron base alloys
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Summary:Smooth round specimens were cut from a large ESR cast-to-shape gas turbine disc (ECD) of a Fe-28Ni-14Cr alloy with a characteristic structure of coarse-branch crystal melted in vacuum and in air, respectively. The specimens were heat-treated according to a schedule of 1050DGC/4 hr, cooling in oil; and 700DGC/32 hr, cooling in air. All fatigue-creep tests were carried out under constant maximum stress at 650DGC in air. During the testing, both fatigue stress (alternating stress) and creep stress (mean stress) could be varied in simultaneously opposite directions by changing the minimum stresses.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0022-2461
1573-4803
DOI:10.1023/B:JMSC.0000026953.89972.33