Resumo

GONZALEZ, Verónica; LOPEZ, Ramón  e  LUIGGI, Ney. Efecto de tratamiento isotérmico sobre los cambios de fases de una aleacion AA8011. Rev. mex. fis. [online]. 2006, vol.52, suppl.3, pp.147-149. ISSN 0035-001X.

In this work we have detected the isothermal phase transformations occurring in an AA8011 alloy which was homogenized by 24 hours at 600°C. A non isothermal heating at 10°C/min between 20 and 600°C permitted us to determine, by means of differential scanning calorimetry (DSC), the characteristic temperatures of the structural transformations, which are identified at 271.8, 450 and 474.2°C. Isothermal kinetics in situ at these temperatures reveal that heat flux changes which are associated with process of precipitation and dilution of structural phases.

Palavras-chave : AA8011; isothermal behavior; precipitate.

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