| Autor: |
Yuke Liu, Fubin Wang, De Xu, Jiandong Wang, Fengchun Jiang, Mehrdad Zarinejad, Yunxiang Tong |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Journal of Materials Research and Technology, Vol 22, Iss , Pp 1935-1947 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2238-7854 |
| DOI: |
10.1016/j.jmrt.2022.12.068 |
| Popis: |
Ti6Al4V alloy produced by additive manufacturing are generally characterized by their columnar β grain structure and the resulting anisotropy in mechanical properties as a critical challenge in engineering applications. In the present work, a near equiaxed β grain structure is obtained in the Ti6Al4V alloy thin-wall specimens produced by laser metal deposition through tailoring laser power and interlayer dwell time. Microstructure, texture, and mechanical properties of the as-deposited alloys are investigated as functions of processing parameters. When the interlayer dwell time is fixed at 10 s, the columnar β grain structure changes to a near equiaxed morphology, and the grain width (size) decreases with increasing laser power from 1200 W to 1500 W. Recrystallization of the previously deposited layers during processing is suggested to be responsible for the formation of the near-equiaxed β grain structure. All the as-deposited alloys consist of a weakly textured α phase and the β phase at room temperature. The as-deposited alloys with the near-equiaxed β grains show superior mechanical properties, as evidenced by large elongation values up to 14%. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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