Publication detail
Effect of tensile dwell on low cycle fatigue of cast superalloy Inconel 792-5A at 800 C
ŠMÍD, M. OBRTLÍK, K. PETRENEC, M. POLÁK, J.
Czech title
Vliv tahových prodlev na nízkocyklovou únavu lité superslitiny Inconel 792-5A při 800 C
English title
Effect of tensile dwell on low cycle fatigue of cast superalloy Inconel 792-5A at 800 C
Type
journal article - other
Language
en
Original abstract
Effect of tensile dwell on low cycle fatigue of cast Inconel 792-5A is studied in symmetrical strain cycling at 800 C. Cyclic hardening/softening curves, cyclic stress-strain curves (CSSC) and fatigue life curves were obtained in continuous cycling and in cycling with tensile dwells. Dwells have slight effect on hardening/softening curves at high strain amplitudes. CSSC in cycling with dwells is shifted to lower stress amplitudes. No significant effect of dwells on Basquin curves is observed. Density of slip markings in cintinuous cycling is significantly higher in comparison with cycling with dwells. Samples cycled with dwells are typical of high density of secondary cracks, although sporadic slip markings were also found.
Czech abstract
Byl studován vliv tahových prodlev na nízkocyklovou únavu litého Inconelu 792-5A při 800C. Byly získány křivky cyklického zpevnění/změkčení, cyklické deformační křivky a křivky únavové životnosti jak ze spojitého cyklického zatěžování, tak i cyklického zatěžování s tahovými prodlevami. Hustota skluzových stop při spojitém cyklickém je výrazně vyšší než při cyklování s prodlevami. Zkušební tyče podrobené únavovému zatěžování s tahovými prodlevami obsahovaly vysokoou hustotu sekundárních trhlin podél hranic zrn.
English abstract
Effect of tensile dwell on low cycle fatigue of cast Inconel 792-5A is studied in symmetrical strain cycling at 800 C. Cyclic hardening/softening curves, cyclic stress-strain curves (CSSC) and fatigue life curves were obtained in continuous cycling and in cycling with tensile dwells. Dwells have slight effect on hardening/softening curves at high strain amplitudes. CSSC in cycling with dwells is shifted to lower stress amplitudes. No significant effect of dwells on Basquin curves is observed. Density of slip markings in cintinuous cycling is significantly higher in comparison with cycling with dwells. Samples cycled with dwells are typical of high density of secondary cracks, although sporadic slip markings were also found.
Keywords in Czech
niklové superslitiny, zvýšená teplota, nízkocyklová únava, prodlevy
Keywords in English
nickle base superalloy, elevated temperatures, low cycle fatigue, dwells
RIV year
2012
Released
13.01.2012
Publisher
Trans Tech Publications
Location
Švýcarsko
ISSN
1013-9826
Journal
Key Engineering Materials
Volume
2012
Number
488-489
Pages from–to
735–738
Pages count
4
BIBTEX
@article{BUT74247,
author="Miroslav {Šmíd} and Karel {Obrtlík} and Martin {Petrenec} and Jaroslav {Polák},
title="Effect of tensile dwell on low cycle fatigue of cast superalloy Inconel 792-5A at 800 C",
journal="Key Engineering Materials",
year="2012",
volume="2012",
number="488-489",
month="January",
pages="735--738",
publisher="Trans Tech Publications",
address="Švýcarsko",
issn="1013-9826"
}