Effects of friction stir processing and minor Sc addition on the microstructure, mechanical properties, and damping capacity of 7055 Al alloy
| Autor: | C.Y. Liu, Bing Zhang, Y. Chen, Hongfeng Huang, W.B. Zhou, H.J. Jiang, Z.Y. Ma, L.L. Wei |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Friction stir processing Mechanical Engineering Alloy Metallurgy Recrystallization (metallurgy) 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Damping capacity Mechanics of Materials 0103 physical sciences engineering General Materials Science Grain boundary Composite material Stress corrosion cracking 0210 nano-technology Grain structure |
| Zdroj: | Materials Characterization. 135:25-31 |
| ISSN: | 1044-5803 |
| DOI: | 10.1016/j.matchar.2017.11.030 |
| Popis: | This study investigated the effects of friction stir processing (FSP) and addition of 0.25% (mass ratio) Sc on the microstructure, mechanical properties, and damping capacity of AA 7055 alloy. Microstructure analyses revealed that a low tool rotation rate of 300 rpm effectively inhibited the grain coarsening in the recrystallization of the alloy during FSP. Sc addition prevented the coarsening of grains and precipitated η phase and the annihilation of dislocations in the FSP AA 7055 alloy. After being subjected to FSP at 300 rpm, the AA 7055 alloy containing Sc exhibited good mechanical and damping properties, which were mainly attributed to the fine recrystallized grain structure, fine precipitated η phase, and large number of nano-sized Al3(Sc, Zr) particles located at the grain boundaries and dislocations. This work provides an effective strategy for preparing commercial Al alloys with excellent damping capacity and mechanical properties. |
| Databáze: | OpenAIRE |
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