| Autor: |
Yan, L. M., Dai, Y. X., Wang, W. B., Yang, Y. F., Mi, S., Wang, H., Hao, J. P., Yang, D. |
| Předmět: |
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| Zdroj: |
Journal of Materials Engineering & Performance; May2023, Vol. 32 Issue 9, p4014-4021, 8p |
| Abstrakt: |
A novel heat treatment process combining cooling pretreatment after artificial aging treatment of a high-temperature solid solution was conducted to coordinate the mechanical properties with the corrosion resistance of 7055 aluminum alloy. In the present investigation, after treatment with a high-temperature solid solution (480 °C × 1 h), the alloys were held at 455 °C for 0.5 h, quenched in water and then aged at 120 °C for 24 h (CPt455+T6). After the CPt455+T6 treatment, the alloy exhibited an ultimate tensile strength and elongation of 623 MPa and 15.7%, respectively, which were similar to those of the SS+T6 state. Moreover, the alloy showed excellent resistance to medium corrosion, which was superior to that of the T74 state. The well-matched strength and plasticity of the CPt455+T6 sample was due to the synergistic effects of intragranular nanosized precipitates and a narrow precipitate-free zone (PFZ). The improvement in corrosion resistance was attributed to the intermittent distribution of the grain boundary η phase and the high Cu content in the grain boundary η phase. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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