Insights into core-shell multi-structure and strengthening by multi-microalloying (Sc, Zr, Er and Ti) of a T6 treated Al–Li–Mg alloy
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 cor...
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Elsevier
2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424028382 |
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| author | Dengfeng Yin Shenchen Zhang Xin Li Jiangang Yao Qi Yin Andrej Atrens Ming-Chun Zhao |
| author_facet | Dengfeng Yin Shenchen Zhang Xin Li Jiangang Yao Qi Yin Andrej Atrens Ming-Chun Zhao |
| author_sort | Dengfeng Yin |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-c521d8a2f4f44572990efef0e6b34342 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj-art-c521d8a2f4f44572990efef0e6b343422025-01-19T06:25:09ZengElsevierJournal of Materials Research and Technology2238-78542025-01-0134286296Insights into core-shell multi-structure and strengthening by multi-microalloying (Sc, Zr, Er and Ti) of a T6 treated Al–Li–Mg alloyDengfeng Yin0Shenchen Zhang1Xin Li2Jiangang Yao3Qi Yin4Andrej Atrens5Ming-Chun Zhao6Department of Materials, Yantai Nanshan University, Yantai, 265713, China; School of Materials Science and Engineering, Central South University, Changsha, 410083, ChinaSchool of Materials Science and Engineering, Central South University, Changsha, 410083, ChinaSchool of Materials Science and Engineering, Central South University, Changsha, 410083, ChinaDepartment of Materials, Yantai Nanshan University, Yantai, 265713, ChinaDepartment of Materials, Yantai Nanshan University, Yantai, 265713, ChinaSchool of Mechanical and Mining Engineering, University of Queensland, Brisbane, QLD, 4072, AustraliaDepartment of Materials, Yantai Nanshan University, Yantai, 265713, China; School of Materials Science and Engineering, Central South University, Changsha, 410083, China; Corresponding author. School of Materials Science and Engineering, Central South University, Changsha, 410083, China.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.http://www.sciencedirect.com/science/article/pii/S2238785424028382Al-Li-Mg alloyMulti-microalloyingT6 treatmentCore-shell multi-structureprecipitationStrengthening |
| spellingShingle | Dengfeng Yin Shenchen Zhang Xin Li Jiangang Yao Qi Yin Andrej Atrens Ming-Chun Zhao Insights into core-shell multi-structure and strengthening by multi-microalloying (Sc, Zr, Er and Ti) of a T6 treated Al–Li–Mg alloy Journal of Materials Research and Technology Al-Li-Mg alloy Multi-microalloying T6 treatment Core-shell multi-structure precipitation Strengthening |
| title | Insights into core-shell multi-structure and strengthening by multi-microalloying (Sc, Zr, Er and Ti) of a T6 treated Al–Li–Mg alloy |
| title_full | Insights into core-shell multi-structure and strengthening by multi-microalloying (Sc, Zr, Er and Ti) of a T6 treated Al–Li–Mg alloy |
| title_fullStr | Insights into core-shell multi-structure and strengthening by multi-microalloying (Sc, Zr, Er and Ti) of a T6 treated Al–Li–Mg alloy |
| title_full_unstemmed | Insights into core-shell multi-structure and strengthening by multi-microalloying (Sc, Zr, Er and Ti) of a T6 treated Al–Li–Mg alloy |
| title_short | Insights into core-shell multi-structure and strengthening by multi-microalloying (Sc, Zr, Er and Ti) of a T6 treated Al–Li–Mg alloy |
| title_sort | insights into core shell multi structure and strengthening by multi microalloying sc zr er and ti of a t6 treated al li mg alloy |
| topic | Al-Li-Mg alloy Multi-microalloying T6 treatment Core-shell multi-structure precipitation Strengthening |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424028382 |
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