2026-07-29T00:01:54Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/81832023-12-06T01:05:13Zcom_10259_6214com_10259_5086com_10259_2604com_10259_8139com_10259_3808com_10259.4_106col_10259_6215col_10259_8140
Repositorio Institucional de la Universidad de Burgos
author
Preciado Calzada, Mónica
author
Bravo Díez, Pedro Miguel
author
Cárdenas Gonzalo, David
2023-12-05T10:26:46Z
2023-12-05T10:26:46Z
2016-10
0094-4289
http://hdl.handle.net/10259/8183
10.1115/1.4033466
1528-8889
The fatigue properties of high-pressure die-casting (HPDC) magnesium (Mg) alloys AZ91 exhibit a high variability, due primarily to the porosity that is inherent in the injection process. In the 94% of the studied samples, the porosity in which crack nucleation originates is at the surface or adjacent to the surface. The threshold stress intensity factor amplitude and the limit of fatigue have been calculated following the classical models of parameterization of defects. A new set of samples were prepared by machining the surface slightly, in order to conserve the microstructure, and the fatigue behavior at low level of stress was improved. All the samples were produced in molds with the final shape by HPDC process, which allowed a realistic study of the surface effect and the influence of grain size variation from the edge to the center of the samples.
eng
Atribución 4.0 Internacional
Fatigue
Materials processing
Fracture (Materials)
High pressure (Physics)
Magnesium alloys
High pressure (Physics)
Magnesium alloys
Porosity
Influence of Porosity in the Fatigue Behavior of the High-Pressure Die-Casting AZ91 Magnesium Alloys
info:eu-repo/semantics/article
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URL
https://riubu.ubu.es/bitstream/10259/8183/1/Preciado-jemt_2016.pdf
File
MD5
a853ebdc99834e6367b9a616126785d6
2124349
application/pdf
Preciado-jemt_2016.pdf