Effect of Solidification Rate and Composition on Segregation in Al-Li-Cu-Zr Alloys |
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| Journal | Defect and Diffusion Forum (Volumes 258 - 260) |
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| Volume | Diffusion in Solids and Liquids |
| Edited by | Andreas Öchsner and José Grácio |
| Pages | 15-19 |
| DOI | 10.4028/www.scientific.net/DDF.258-260.15 |
| Citation | Shahram Ahmadi et al., 2006, Defect and Diffusion Forum, 258-260, 15 |
| Online since | October, 2006 |
| Authors | Shahram Ahmadi, Ali Shokuhfar, S.M.M. Hadavi, Arash Rezaei, H. Azimi |
| Keywords | Al-Li-Cu-Zr, Differential Thermal Analysis (DTA), Segregation, Solidification |
| Abstract | In the present study, solidification and segregation of Al-Li-Cu-Zr alloys have been investigated. Results show that shape of ingots and amount of lithium can change solidification essence. Increasing solidification rate, not only eliminates grain-refining effect of zirconium but also causes coarse segregation of copper in grain boundaries (negative segregation). Increasing amount of lithium in Al-Cu-Li-Zr alloys can change the solubility of other alloying elements (Cu, Zr) and increase solidification range and microsegregation of copper in structure. |
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