Publicado

2014-07-01

Study of the effect of silver in the mechanical properties and electrical conductivity of duralumins (Al-4%Cu-0.5%Mg)

Estudio del efecto de la plata en las propiedades mecánicas y conductividad eléctrica de los duraluminios (Al-4%Cu-0,5%Mg)

DOI:

https://doi.org/10.15446/dyna.v81n186.39785

Palabras clave:

Duralumin, hardening by precipitation, homogenization, aging, phases, electrical resistance of metals, metals Joule effect (en)
Duraluminios, endurecimiento por precipitación, homogenización, envejecimiento, fases, resistencia eléctrica de metales, efecto Joule en metales (es)

Autores/as

  • Reinaldo Correa-Avendaño Universidad de Antioquia
  • Héctor Darío Sánchez-Londoño Universidad de Antioquia
  • Edwin García-Quintero Universidad de Antioquia
This study evaluated the effect of the silver content of Al-Cu based alloys on the microstructure, the tensile strength, the electrical resistance and the temperature increase with the passage of electric current (Joule effect). For that purpose, Al-4% Cu-0, 5% Mg alloys were tested with silver content in proportions of 1.5%, 2.5% and 3.5%. Precipitation hardening was carried out by homogenization heat treatment of solid solutions. The microstructure analysis was carried out using optical microscope and SEM, Vickers hardness tests was also performed, tests of tensile strength and electrical conductivity, which were compared with the alloy A356-T6. The results of this research show that the increase of silver in the alloy increased tensile strength and decreases the resistivity. By SEM and EDS analysis of the phase q (CuAl2), Al6 (Cu, Fe) and Al7Cu2Fe was observed.
En este trabajo se evalúa el efecto del contenido de plata de las aleaciones base Al-Cu en la microestructura, la resistencia a la tracción, la resistencia eléctrica y el incremento de la temperatura con el paso de la corriente eléctrica (efecto Joule). Para tal fin, fueron evaluadas las aleaciones Al-4%Cu-0,5%Mg con contenidos de plata en proporciones del 1,5%, 2,5% y 3,5%. El endurecimiento por precipitación se llevó a cabo mediante tratamientos térmicos de homogenización por solución sólida. El análisis de la microestructura se realizó mediante el microscopio óptico y SEM, además, se realizó análisis de dureza Vickers, ensayos de resistencia a la tracción y pruebas de conductividad eléctrica, las cual se compararon con la aleación A356-T6. Los resultados de esta investigación muestran que el aumento de la plata en la aleación aumenta la resistencia la tracción y disminuye su resistividad. Mediante el análisis del SEM y EDS se observó la fase q (CuAl2), Al6(Cu, Fe) y Al7Cu2Fe.

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