Unified constitutive model for 7050 aluminum alloy and its application to microstructure prediction in three-roll skew rolling of hollow shafts
Artykuł w czasopiśmie
MNiSW
140
Lista 2024
| Status: | |
| Autorzy: | Chen Yusen, Wang Ying, Yan Shuyang, Xu Haijie, Li Zixuan, Pater Zbigniew, Bulzak Tomasz, Tomczak Janusz, Shu Xuedao |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2026 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Wolumen/Tom: | 178 |
| Strony: | 320 - 338 |
| Impact Factor: | 7,8 |
| 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. U23A20629 and No. 52375346), Ningbo International Science and Technology Cooperation Projects (2025Z221). |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| The prediction of microstructure and the control of dimensional precision are of paramount importance in the fabrication of high-performance 7xxx-series aluminum alloy hollow parts via hot plastic forming. In this work, an integrated experimental and numerical framework was uti-lized to explore the microstructural evolution of 7050 aluminum alloy during three-roll skew rolling (TRSR) with a mandrel. Initially, an internal state variable-based unified viscoplastic con-stitutive model was constructed, informed by isothermal compression testing. Subsequently, this model was integrated into finite element (FE) codes through custom subroutines, with its predic-tive reliability verified by comparing numerical simulations with experimental observations. Based on this model, a macro-micro coupled simulation and experimental investigation were conducted on the complex hot skew rolling process of 7050 aluminum alloy hollow shafts with a uniform inner diameter. The results indicate that microstructural evolution is essentially driven by the synergistic interaction between thermal activation and strain accumulation duration. The ex-perimental and numerical findings effectively demonstrate that grain refinement during the in-tense deformation of hot skew rolling involves a progressive transition from continuous dynamic recrystallization (CDRX) to geometric dynamic recrystallization (GDRX), accompanied by a cer-tain degree of discontinuous dynamic recrystallization (DDRX). A pronounced grain refinement is observed along the rolling direction, extending from the inner to the outer surfaces of the pro-cessed workpiece. Parametric sensitivity analysis indicates that elevating the deformation temper-ature, synchronized with a reduced deflection angle, constitutes an efficient pathway to promote recrystallization kinetics and refine the microstructural features across the entire wall thickness of the hollow shafts. These findings establish a robust theoretical foundation and offer practical technical insights for the high-precision fabrication of premium aluminum alloy hollow parts. |
