2026-04-18T04:27:03Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/82972024-01-12T01:05:14Zcom_10259_6214com_10259_5086com_10259_2604col_10259_6215

Strain Rate during Creep in High-Pressure Die-Cast AZ91 Magnesium Alloys at Intermediate Temperatures Preciado Calzada, Mónica Bravo Díez, Pedro Miguel Calaf Chica, José Ballorca Juez, Daniel AZ91 Magnesium alloys Creep High pressure die casting Ingeniería civil Resistencia de materiales Civil engineering Strength of materials 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. 2024-01-11T10:58:29Z 2024-01-11T10:58:29Z 2019-03 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/10259/8297 10.3390/ma12060872 1996-1944 eng Materials. 2019, V. 12, n. 6, 872 https://doi.org/10.3390/ma12060872 Atribución 4.0 Internacional http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess application/pdf MDPI