MICROSTRUCTURE OF ALUMINUM-LITHIUM ALLOYS OBTAINED WITH DIRECTIONAL SOLIDIFICATION

ARES, ALICIA;; RIOS, CARLOS;; CARAM, RUBENS; SCHVEZOV, CARLOS

Light Metals 2002

Wolfgang Schneider, editor. A publication of the Minerals, Metals, & Materials Society

Lugar: Seattle, Washington. USA; Año: 2002; p. 777 - 784

The Aluminum - Lithium Alloys are of important use in the auto and aerospace industry. It is generally accepted that good solidification structures are required for performance. In the present report the solidification structure of these alloys are studied experimentally. Alloys containing Al, Li and Cu were directionally solidified under different conditions of temperature gradients and velocities; the alloys also contained grain refiners. The alloys which were added with refiners were completely equiaxed. The dendritic structure were analyzed with scanning electron microscopy and image analyzer. The secondary dendritic space were measured and the results were compared and correlated with the models available in the literature.