| Autor: |
Hui Yu, Ya Liu, Yu Liu, Dongliang Wang, Yuling Xu, Binan Jiang, Weili Cheng, Weineng Tang, Fuxing Yin, Wei Yu |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Journal of Materials Research and Technology, Vol 24, Iss , Pp 940-951 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2238-7854 |
| DOI: |
10.1016/j.jmrt.2023.03.068 |
| Popis: |
The microstructural evolution and mechanical properties of twin-roll casting (TRC) and hot rolling (HR) Mg–3Al–1Bi (in wt.%, TRC-AB31 and HR-AB31) alloys were investigated and compared with AZ31 alloy as the benchmark. The addition of Bi in TRCed alloys can not only reduce the central segregation but also introduce thermally stable Mg3Bi2 phases distributed uniformly in the α-Mg matrix. The second phases with a larger size lead to particle stimulated nucleation (PSN), which in turn, promoted the dynamic recrystallization (DRX) in HR-AB31 alloy and weaken its basal texture. The second phases play two different roles in AB31 alloy, on the one hand, the grain refinement and uniform microstructure resulted from enhanced DRX by second particles which retarding dislocation movement as well as inhibition of grain growth. On the other hand, such brittle particles can also act as the cracking source and degrade elongation. The strengthening mechanism of both AZ31 and AB 31 alloys is discussed and investigated. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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