Analysis of Effective and Internal Cyclic Stress Components in the Inconel Superalloy Fatigued at Elevated Temperature
Result description
Cyclic multiple step test in strain control have been performed on cylindrical specimens of cast polycrystalline Inconel 738LC and 792-5A nickel-base superalloys at 800 °C in laboratory atmosphere. Selected hysteresis loops were derived and analysed according to the statistical theory of hysteresis loop. The effective and internal stress components were possible to determine. The effective stress of ?´ precipitate has significant influence on stress-strain response of studied materials. Therefore IN 792-5A exhibits higher stress amplitudes than IN 738LC at approximately same total strain amplitude values, because of significantly higher effective stress of ?´. Cyclic hardening/softening curves and shortened cyclic stress-strain curves were obtained. Cyclic hardening/softening behaviour depends on strain amplitude. Low amplitude straining was characterised by saturation of the stress amplitude. In high amplitude straining slight softening was found. The shortened cyclic stress-strain cu
Keywords
low cycle fatiguesuperalloyshigh temperaturehysteresis loopeffective and internal stresses
The result's identifiers
Result code in IS VaVaI
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Analysis of Effective and Internal Cyclic Stress Components in the Inconel Superalloy Fatigued at Elevated Temperature
Original language description
Cyclic multiple step test in strain control have been performed on cylindrical specimens of cast polycrystalline Inconel 738LC and 792-5A nickel-base superalloys at 800 °C in laboratory atmosphere. Selected hysteresis loops were derived and analysed according to the statistical theory of hysteresis loop. The effective and internal stress components were possible to determine. The effective stress of ?´ precipitate has significant influence on stress-strain response of studied materials. Therefore IN 792-5A exhibits higher stress amplitudes than IN 738LC at approximately same total strain amplitude values, because of significantly higher effective stress of ?´. Cyclic hardening/softening curves and shortened cyclic stress-strain curves were obtained. Cyclic hardening/softening behaviour depends on strain amplitude. Low amplitude straining was characterised by saturation of the stress amplitude. In high amplitude straining slight softening was found. The shortened cyclic stress-strain cu
Czech name
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Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JL - Fatigue and fracture mechanics
OECD FORD branch
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Result continuities
Project
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Advanced Materials Research
ISSN
1022-6680
e-ISSN
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Volume of the periodical
278
Issue of the periodical within the volume
4
Country of publishing house
CH - SWITZERLAND
Number of pages
6
Pages from-to
393-398
UT code for WoS article
000303548400066
EID of the result in the Scopus database
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Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
JL - Fatigue and fracture mechanics
Year of implementation
2011