Počet záznamů: 1
High-temperature low-cycle fatigue and fatigue–creep behaviour of Inconel 718 superalloy: Damage and deformation mechanisms
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SYSNO ASEP 0586291 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název High-temperature low-cycle fatigue and fatigue–creep behaviour of Inconel 718 superalloy: Damage and deformation mechanisms Tvůrce(i) Bartošák, M. (CZ)
Horváth, J. (CZ)
Gálíková, Markéta (UFM-A)
Slaný, M. (CZ)
Šulák, Ivo (UFM-A) ORCIDCelkový počet autorů 5 Číslo článku 108369 Zdroj.dok. International Journal of Fatigue. - : Elsevier - ISSN 0142-1123
Roč. 186, SEP (2024)Poč.str. 17 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova Low-cycle fatigue ; Fatigue–creep ; Inconel 718 superalloy ; Damage mechanisms ; Microstructure Vědní obor RIV JG - Hutnictví, kovové materiály Obor OECD Materials engineering CEP EH22_008/0004634 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Open access Institucionální podpora UFM-A - RVO:68081723 UT WOS 001249227100001 EID SCOPUS 85194333802 DOI https://doi.org/10.1016/j.ijfatigue.2024.108369 Anotace In this article, strain-controlled Low-Cycle Fatigue (LCF) and fatigue–creep tests were performed on Inconel
718 nickel-based superalloy at temperatures of 650 ◦C and 730 ◦C. LCF tests at elevated temperatures were
performed with a mechanical strain rate of 1 × 10−3/s, while fatigue–creep tests involved either tensile or
compressive strain dwell. Both the LCF and fatigue–creep tests revealed cyclic softening, with the mean stress
evolving oppositely to the applied strain dwell in the fatigue–creep tests. Investigations into the damage
mechanisms identified intergranular cracking as the predominant failure mode. Fatigue–creep loading with
a compressive dwell resulted in multiple crack initiations from transgranular oxide intrusions, along with
multiple creep cavities during loading at 730 ◦C. Deformation features such as persistent slip bands and
deformation nanotwins were observed during cycling at 650 ◦C. In addition, fatigue–creep tests at 730 ◦C
exhibited 𝛿 phase precipitation and a coarsening of strengthening precipitates, contributing to additional
softening that increased over prolonged test durations. Finally, the observed lifetime during LCF tests decreased
with increasing temperatures, and fatigue–creep loading was observed to be more damaging than LCF. On the
other hand, fatigue–creep loading with a tensile strain dwell demonstrated a higher lifetime compared to LCF
at 730 ◦C.Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2025 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S0142112324002275?via%3Dihub
Počet záznamů: 1