Evolución microestructural y envejecimiento dinámico por deformación en la aleación Mg-6%Gd- 1%Zn durante ensayos a tracción y compresión a temperaturas intermedias

  1. Gerardo Garcés 1
  2. Pablo Pérez 1
  3. Rafael Barea 2
  4. Bryan W. Chávez 2
  5. Judit Medina 1
  6. Paloma Adeva 1
  1. 1 Centro Nacional de Investigaciones Metalúrgicas
    info

    Centro Nacional de Investigaciones Metalúrgicas

    Madrid, España

    ROR https://ror.org/04m7z8d34

  2. 2 Universidad Nebrija
    info

    Universidad Nebrija

    Madrid, España

    ROR https://ror.org/03tzyrt94

Aldizkaria:
Revista de metalurgia

ISSN: 0034-8570

Argitalpen urtea: 2018

Alea: 54

Zenbakia: 3

Orrialdeak: 124

Mota: Artikulua

DOI: 10.3989/REVMETALM.124 DIALNET GOOGLE SCHOLAR lock_openSarbide irekia editor

Beste argitalpen batzuk: Revista de metalurgia

Laburpena

La aleación Mg-6%Gd-1%Zn muestra el fenómeno de serrado durante la deformación a temperaturas intermedias debido al proceso de envejecimiento dinámico provocado por la presencia de átomos de soluto en solución sólida y dislocaciones móviles. Aunque la aleación tiene una textura al azar, se observa un comportamiento diferente en tracción y en compresión. El límite elástico y el endurecimiento es mayor cuando la aleación se ensaya en compresión. Durante la deformación a temperaturas intermedias se ha observado la activación de dislocaciones tipo < a > y maclas de tensión, independientemente del signo de la carga. Sin embargo, la fracción en volumen de maclas es siempre mayor cuando el material se somete a compresión. A temperaturas intermedias, los átomos de Gd y Zn anclan tanto las dislocaciones como las maclas. Por encima de 250 ºC, el fenómeno de serrado desaparece y la presencia de precipitados g´ y g´´ en el plano basal aumenta el endurecimiento.

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Finantzaketari buruzko informazioa

We should like to acknowledge financial support of the Spanish Ministry of Economy and Competitiveness under project number MAT2016-78850-R.

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