MICROSTRUCTURAL TRANSFORMATION IN SITU AND ITS CORRELATION WITH THE ELECTRICAL RESISTIVITY IN ALUMINIUM ALLOY A-6061

Authors

  • José Luis Ochoa Meza Investigador del Centro de Ingeniería de Materiales y Nanomateriales del Instituto Venezolano de Investigaciones Científicas, IVIC.
  • Gema González Centro de Ingenieria de Materiales y Nanotecnologia, del Instituto Venezolano de Investigaciones Cientificas, IVIC.
  • Lisbeth de Lourdes Lozada Espinoza Centro de Ingenieria de Materiales y Nanotecnologia, del Instituto Venezolano de Investigaciones Cientificas, IVIC.

Abstract

In the present work, a comparative study between the variation of electrical resistivity as a function of the dynamic temperature and the phase transformations observed in the aluminium AA-6061 alloy was carried out, during “in situ” TEM aging. By this method, it was possible observe the growth of precipitates. For isothermal aging between 200 y 350°C the formation of the phases β´´ and β´ was observed. At higher temperatures, the subsequent transformation to β phase, and the redissolution of phases at temperatures above 450°C was also observed. Particularly, the metastable phases β´´ and β´ reached their maximum size between 220 and 350°C. In another type of experiment, the electrical resistivity measured up, being observed that the variations shown by this parameter were directly associated with the phase transformations, and they were also strongly influenced by the presence of the phases β´´ and β´.

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Author Biographies

José Luis Ochoa Meza, Investigador del Centro de Ingeniería de Materiales y Nanomateriales del Instituto Venezolano de Investigaciones Científicas, IVIC.

Investigador del Centro de Ingeniería de Materiales y Nanomateriales del Instituto Venezolano de Investigaciones Científicas, IVIC.

Gema González, Centro de Ingenieria de Materiales y Nanotecnologia, del Instituto Venezolano de Investigaciones Cientificas, IVIC.

Investigadora Jefa del Centro de Ingenieria de Materiales y Nanotecnologia, del Instituto Venezolano de Investigaciones Cientificas, IVIC.

Lisbeth de Lourdes Lozada Espinoza, Centro de Ingenieria de Materiales y Nanotecnologia, del Instituto Venezolano de Investigaciones Cientificas, IVIC.

Profesional Asociada a la Investigacion del Centro de Ingenieria de Materiales y Nanotecnologia, del Instituto Venezolano de Investigaciones Cientificas, IVIC.

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Published

2011-09-02

How to Cite

Ochoa Meza, J. L., González, G., & Lozada Espinoza, L. de L. (2011). MICROSTRUCTURAL TRANSFORMATION IN SITU AND ITS CORRELATION WITH THE ELECTRICAL RESISTIVITY IN ALUMINIUM ALLOY A-6061. LatinAmerican Journal of Metallurgy and Materials, 185–184. Retrieved from https://www.rlmm.org/index.php/rlmm/article/view/160

Issue

2012, 32(2)

Section

Regular Articles

License

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