0560105 - ÚFM 2023 RIV GB eng J - Článek v odborném periodiku
Šulák, Ivo - Obrtlík, Karel - Babinský, Tomáš - Guth, S.
The low cycle fatigue behaviour of MAR-M247 superalloy under different strain rates and cycle shapes at 750?C.
International Journal of Fatigue. Roč. 164, NOV (2022), č. článku 107133. ISSN 0142-1123. E-ISSN 1879-3452
Grant CEP: GA MŠMT(CZ) EF18_053/0016933
Institucionální podpora: RVO:68081723
Klíčová slova: Strain rate influence * Slowfast & * fastslow tests * Creepfatigue interaction * Nickelbased superalloy * High temperature
Obor OECD: Materials engineering
Impakt faktor: 6, rok: 2022 ; AIS: 0.876, rok: 2022
Způsob publikování: Omezený přístup
Web výsledku:
https://www.sciencedirect.com/science/article/pii/S0142112322003899?via%3DihubDOI: https://doi.org/10.1016/j.ijfatigue.2022.107133

High-temperature low-cycle fatigue experiments were performed at different strain rates on nickel-based su-peralloy MAR-M247. Furthermore, slow-fast, fast-slow and dwell-fatigue tests were conducted. The deformation, damage and lifetime behaviour as a function of strain rate and cycle shape were observed. Results show that the lifetime decreases with decreasing strain rate, indicating the negative influence of time-dependent creep and oxidation mechanisms. The lifetimes of slow-fast and dwell-fatigue tests are lower than those for fast-slow tests, although the mean stress is compressive in slow-fast and dwell-fatigue tests and tensile in fast-slow tests. Slowfast and dwell-fatigue tests lead to grain boundary cavitation.
Trvalý link: https://hdl.handle.net/11104/0333302