| Autor: |
Kai Li, Huiqun Liu, Ningjie Gu, Xiang Xiao, Shan Dai, Jiatao Liu, Danqing Yi |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Journal of Materials Research and Technology, Vol 20, Iss , Pp 3158-3172 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2238-7854 |
| DOI: |
10.1016/j.jmrt.2022.08.114 |
| Popis: |
The Ti-4Al-0.005B alloy were rolled at 940 °C or 990 °C followed by annealing at 650 °C. In order to control the final microstructure, rolling at medium temperature of 550 °C was processed in two other plates after rolling at 940 °C or 990 °C. The rolling and tensile behaviors of Ti-4Al-0.005B alloy with equiaxed and lamellar microstructure are comparatively studied using electron backscatter diffraction (EBSD) technique. It is found that the grain refinement mechanism of 940 °C and 940 + 550 °C rolled samples is continuous dynamic recrystallization (CDRX), while the 990 + 550 °C samples combine CDRX and twinning. The strong basal/near basal textures (B/N textures) in 940 °C and 940 + 550 °C rolled samples was mainly related to basal slip and pyramidal slip. Strong transverse textures (T-type texture) formed in 990 °C rolled sample due to variant selection during the β→α phase transformation and 990 + 550 °C rolled sample exhibits a mixed of T-type texture and B/N texture. The 990 + 550 °C rolled sample exhibited a best mechanical properties combined of strength and ductility due to its mixed texture and refined α grains. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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