Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/8374
Título
Strain Rate during Creep in High-Pressure Die-Cast AZ91 Magnesium Alloys at Intermediate Temperatures
Publicado en
Materials. 2019, V. 12, n. 6, 872
Editorial
MDPI
Fecha de publicación
2019
ISSN
1996-1944
DOI
10.3390/ma12060872
Résumé
During creep, magnesium alloys undergo microstructural changes due to temperature and stress. These alterations are associated with the evolution of the present phases at a microstructural level, creating different strain rates during primary and tertiary creep, and with the stability of the inter-metallic phase Mg17Al12 formed at these temperatures. In this paper, the results of creep testing of high-pressure die-cast AZ91 magnesium alloys are reported. During creep, continuous and discontinuous precipitates grow, which influences creep resistance. The creep mechanism that acts at these intermediate temperatures up to 150 °C is termed dislocation climbing. Finally, the influence of the type of precipitates on the creep behavior of alloys is determined by promoting the formation of continuous precipitates by a short heat treatment prior to creep testing.
Palabras clave
AZ91
Magnesium alloys
Creep
High pressure die casting
Materia
Ingeniería civil
Civil engineering
Resistencia de materiales
Strength of materials
Ensayos (Tecnología)
Testing
Versión del editor
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