Effect of aging temperature on microstructure and mechanical properties of different rolling orientations in novel Al–Li alloy
| Autor: | Z. P. Zhou, W.D. Zeng, W. H. Yang, C. L. Shi, Chao Zhang, Z. L. Du, H. J. Wang |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Materials Science and Technology. 30:893-899 |
| ISSN: | 1743-2847 0267-0836 |
| DOI: | 10.1179/1743284713y.0000000461 |
| Popis: | Microstructure and properties of different rolling orientation with aging temperature varying in a newly developed Al–Li alloy was investigated by transmission electron microscopy (TEM) analysis. Sheets of experimental Al–Li alloy were solution treated at 510°C for 2 h. Predeformation of ∼3% was stretched in the 0 and 90° angle with respect to the original rolling orientation before aging treatment. All specimens were aged for 35 h at 138, 143, 148, 153, 158 and 163°C respectively. Tensile specimens were stretched along the previous orientation of predeformation. The results showed that the main strengthening phases in the alloy were δ′ (Al3Li), θ′ (Al2Cu)/θ″ (Guinier–Preston II zone), δ′/β′ (Al3Zr) and T1 (Al2CuLi) phase. Among the phases above, the strengthening effect of T1 phase surpassed the others. Moreover, very little of cubic σ (Al5Cu6Mg2) phase was observed in the alloy. The microstructure evolution was similar via comparing sheets in different stretched directions. At initial stage of a... |
| Databáze: | OpenAIRE |
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