Cu/Li Ratio on the Microstructure Evolution and Corrosion Behaviors of Al–xCu–yLi–Mg Alloys
| Autor: | Rui-feng Zhang, Jin-feng Li, Xu-hu Zhang, Yong-lai Chen, Yong-Cheng Lin, Dan-yang Liu, Peng-cheng Ma |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Mg alloys Metallurgy Alloy Metals and Alloys 02 engineering and technology Intergranular corrosion engineering.material 021001 nanoscience & nanotechnology Microstructure Electrochemistry 01 natural sciences Industrial and Manufacturing Engineering Corrosion Phase (matter) 0103 physical sciences engineering Grain boundary 0210 nano-technology |
| Zdroj: | Acta Metallurgica Sinica (English Letters). 33:1201-1216 |
| ISSN: | 2194-1289 1006-7191 |
| DOI: | 10.1007/s40195-020-01023-1 |
| Popis: | The microstructure evolution and the corrosion feature of Al–xCu–yLi–Mg alloys (x:y = 0.44, 1.65 and 4.2) were systematically investigated under the same artificial aging conditions. The relationships between types of precipitates and mechanical performance, as well as electrochemical behaviors, were discussed. Our results show that different types of precipitates can be obtained in alloys with different Cu/Li mass ratios, which significantly influences the mechanical performance of the alloys and substantial corrosion behaviors. Specifically, the analogous corrosion evolution in the aging Al–xCu–yLi–Mg alloys was first ascertained to be derived from the growth mechanism of the precipitates at the grain boundary (GB). Moreover, a small number of GB precipitates can be obtained in the aged alloy with the lowest Cu/Li mass ratio, thereby resulting in the largest intergranular corrosion resistance. A higher proportion of the GB T1 phase in the continuous precipitates induces higher corrosion sensitivity in alloy with a high Cu/Li mass ratio. |
| Databáze: | OpenAIRE |
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