Hot deformation behavior and dynamic recrystallization mechanism of NiCr19Fe19Nb5 high-temperature alloy
Artykuł w czasopiśmie
MNiSW
100
Lista 2024
| Status: | |
| Autorzy: | Cen Zewei, Shu Xuedao, Ye Chao, Ren Yubo, Xia Yingxiang, Li Zixuan, Xu Haijie, Shu Chang, Essa Khamis, Pater Zbigniew |
| Dyscypliny: | |
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| Rok wydania: | 2026 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Wolumen/Tom: | 1051 |
| Numer artykułu: | 186052 |
| Impact Factor: | 6,3 |
| Web of Science® Times Cited: | 0 |
| Scopus® Cytowania: | 0 |
| Bazy: | Web of Science | Scopus |
| Efekt badań statutowych | NIE |
| Finansowanie: | This study was funded by the National Natural Science Foundation of China (No. 52375346). |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| The hot deformation behavior and dynamic recrystallization (DRX) mechanisms of as-cast NiCr19Fe19Nb5 alloy were investigated via isothermal compression tests using a Gleeble-3500 simulator at 950–1150 °C and strain rates of 0.01–10 s−1. Flow stress data were corrected for friction and adiabatic heating effects to develop a strain-compensated Arrhenius constitutive model, yielding an activation energy of 528.6 kJ/mol. Processing maps based on the dynamic material model identified optimal hot-working domains at 950–1020 °C/0.01 s−1 and 1020–1150 °C/0.01–0.1 s⁻¹. Microstructural characterization via EBSD and TEM revealed that elevated temperatures and lower strain rates promote the transition of low-angle to high-angle grain boundaries. Discontinuous DRX (DDRX) was identified as the dominant softening mechanism, characterized by necklace structures and grain boundary bulging. Additionally, subgrain-rotation-induced continuous DRX (CDRX) and twin-induced DRX (TDRX) were observed as auxiliary mechanisms, with TDRX providing supplementary nucleation sites at twin boundaries during early deformation stages. These findings deepen the understanding of deformation mechanisms in NiCr19Fe19Nb5 alloy and offer valuable guidance for optimizing hot-working processes and achieving high-quality manufacturing of Ni-based superalloy components. |
