| Autor: |
FU Yilei, LIU Hui, GAO Yanli, WANG Hailong, CHENG Liqiang, TANG Pengjun |
| Jazyk: |
čínština |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Journal of Aeronautical Materials, Vol 44, Iss 4, Pp 109-117 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
1005-5053 |
| DOI: |
10.11868/j.issn.1005-5053.2023.000109 |
| Popis: |
A novel medium-to-high strength aluminum alloy Al-6Mg-0.7Zr was prepared by using the rapid solidification-powder metallurgy process. The mechanical properties and microstructural changes of the annealed alloy were analyzed and studied through the methods，such as room temperature tensile testing，high temperature tensile testing，SEM and TEM. The results indicate that by using the rapid solidification-powder metallurgy method，the maximum solid solubility of Zr in the Al matrix is exceeded，and the successful preparation of a 0.7% Zr（mass fraction） alloy is achieved. The Al3Zr particles precipitated during the annealing process exhibit a coherent relationship with the matrix，contributing to the strength enhancement of the alloy. The nano-scale Al3Zr particles play a significant role in improving the strength of the Al-6Mg-0.7Zr alloy. At room temperature，the tensile strength of the Al-6Mg-0.7Zr alloy reaches 445 MPa，with the yield strength of 338 MPa and the post-fracture elongation of 20.10%. In addition，Al3Zr particles remain stable at high temperatures and exhibit significant hindrance to grain boundary migration and dislocation movement，thus providing the alloy with excellent high-temperature performance within temperatures below 200 ℃. At 150 ℃，the tensile strength of Al-6Mg-0.7Zr alloy reaches 320 MPa，the yield strength is 266 MPa and the elongation after fracture is 33.37%. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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