| Autor: |
Dengfeng Yin, Shenchen Zhang, Xin Li, Jiangang Yao, Qi Yin, Andrej Atrens, Ming-Chun Zhao |
| Jazyk: |
angličtina |
| Rok vydání: |
2025 |
| Předmět: |
|
| Zdroj: |
Journal of Materials Research and Technology, Vol 34, Iss , Pp 286-296 (2025) |
| Druh dokumentu: |
article |
| ISSN: |
2238-7854 |
| DOI: |
10.1016/j.jmrt.2024.12.035 |
| Popis: |
The core-shell multi-structure and strengthening of a multi-microalloyed (Sc, Zr, Er and Ti) T6 treated Al–Li–Mg alloy were studied using transmission electron microscopy (TEM) and microhardness. The T6 treated microstructure contained core-shell multi-structured particles. The (Sc, Zr, Ti)-rich core was generated at the earlier stage at higher temperature rather than at the final aging stage at 160 °C and still remained during aging. The core edge was Al3Er. The shell layer was δ′-Al3Li. These were generated during aging. The coarsening kinetics and precipitate size distributions of Al3(Sc, Zr, Er, Ti, Li) particles aged at 160 °C indicated that the volume diffusion and surface reaction at the particle/matrix interfaces occurred simultaneously. The particle growth was controlled by a combination of these two mechanisms. Multi-microalloying (Sc, Zr, Er and Ti) into the Al–Li–Mg alloy did not accelerate the peak aging time but increased the strength during aging. The peak hardness of the new Al–Li–Mg-Sc-Zr-Er-Ti alloy was increased by ∼22 % compared to that of the contrasting Al–Li–Mg alloy. Orowan bypass strengthening was the operative mechanism for the core-shell multi-structure particles. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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