Study on Corrosion Behavior of 7075 Aluminum Alloy with Retrogression and Reaging Using Taguchi Method
| Autor: | Ying-dong Qu, Su Ruiming, Jianhao Su, Rongde Li, Tong Liu |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Scanning electron microscope Mechanical Engineering Metallurgy Alloy 02 engineering and technology Intergranular corrosion engineering.material 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Corrosion Taguchi methods Mechanics of Materials 0103 physical sciences engineering General Materials Science Stress corrosion cracking 0210 nano-technology Tensile testing |
| Zdroj: | Journal of Materials Engineering and Performance. 27:6246-6255 |
| ISSN: | 1544-1024 1059-9495 |
| DOI: | 10.1007/s11665-018-3677-z |
| Popis: | The corrosion resistance and mechanical properties of 7075 aluminum alloy are improved by retrogression and reaging (RRA) heat treatment. Due to the complex process of RRA heat treatment, a Taguchi L25 orthogonal array is designed to optimize the process parameters of RRA heat treatment. In this work, analysis of variance was performed to find out the significant heat treatment parameters. Microstructure, mechanical properties, intergranular corrosion, exfoliation corrosion and stress corrosion cracking behaviors of 7075 aluminum alloy after RRA heat treatment were investigated by tensile test, slow strain rate test, transmission electron microscope and scanning electron microscope. Results showed that the RRA treatment involving preaging at 120 °C for 16 h, retrogression at 200 °C for 8 min and reaging at 120 °C for 24 h resulted in a desired combination of corrosion resistance and mechanical properties. |
| Databáze: | OpenAIRE |
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