Estudio de la resistencia a la tracción de depósitos de soldadura de la aleación AA2024-T3

Autores/as

DOI:

https://doi.org/10.18667/cienciaypoderaereo.708

Palabras clave:

Resistencia mecánica, GTAW-P, fractura, agrietamiento en caliente

Resumen

En el presente artículo, se realiza un estudio de la resistencia a la tracción de diferentes depósitos de soldadura sobre láminas de la aleación de aluminio AA2024-T3 AlClad. La soldabilidad de la aleación, bajo procesos de arco, se considera limitada por su sensibilidad al agrietamiento en caliente y, por ello, se encuentra ampliamente estudiada en procesos de estado sólido o láser, en los que la afectación térmica es menor. La investigación tiene como objetivo estudiar el comportamiento mecánico de dicho aluminio al soldarlo con tecnología local. Para la experimentación, se realizaron depósitos con combinaciones de electrodo no consumible punto violeta, electrodo no consumible punto verde, metal de aporte ER4043 y sin metal de aporte (soldadura autógena). Los ensayos mecánicos estuvieron bajo el estándar ASTM E8 y bajo las recomendaciones del estándar AWS D1.2. Adicionalmente, se realizó el respectivo estudio de las superficies de fractura de cada uno de los depósitos. Entre los resultados, se destaca la notable reducción tanto de resistencia mecánica como de ductilidad, lo cual se debió a la alta presencia de porosidad, que desencadenó grietas de diversos tamaños, ligados, también, a una fragilización por hidrógeno y por presencia de partículas de segunda fase en los límites de grano.

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Biografía del autor/a

  • David Alberto Ramírez Vargas, Universidad Nacional de Colombia

    Estudiante de maestría. Universidad Nacional de Colombia. Colombia. Grupo de Investigación: Análisis de Falla e Integridad de Superficies (afis) Rol de investigador: teórico y escritura.

  • Andrés Fernando Gil Plazas, Universidad Nacional de Colombia

    Ingeniero mecánico. Universidad Nacional de Colombia. Colombia Grupo de Investigación: Análisis de Falla e Integridad de Superficies (AFIS) y Grupo de investigación del Centro de Materiales y Ensayos (GIMES, SENA) Rol de investigador: teórico y experimental.

  • Liz Karen Herrera Quintero, Universidad Nacional de Colombia

    Doctora en Ciencia de Materiales. Universidad Nacional de Colombia. Colombia. Grupo de Investigación: Análisis de Falla e Integridad de Superficies (AFIS) Rol de investigador: teórico.

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Publicado

2021-06-01

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Tecnología e Innovación

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Cómo citar

Estudio de la resistencia a la tracción de depósitos de soldadura de la aleación AA2024-T3. (2021). Ciencia Y Poder Aéreo, 16(1), 18-38. https://doi.org/10.18667/cienciaypoderaereo.708