Effect of Solidification Rate and Composition on Segregation in Al-Li-Cu-Zr Alloys

Abstract:

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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.

Info:

Periodical:

Defect and Diffusion Forum (Volumes 258-260)

Edited by:

Andreas Öchsner and José Grácio

Pages:

15-19

DOI:

10.4028/www.scientific.net/DDF.258-260.15

Citation:

S. Ahmadi et al., "Effect of Solidification Rate and Composition on Segregation in Al-Li-Cu-Zr Alloys", Defect and Diffusion Forum, Vols. 258-260, pp. 15-19, 2006

Online since:

October 2006

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Price:

$35.00

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