Current-Induced Ductility Enhancement of a Magnesium Alloy AZ31 in Uniaxial Micro-Tension Below 373 K

Simple item page
dc.contributor.authorWang, Xinwei
dc.contributor.authorEgea, Antonio J. Sanchez
dc.contributor.authorXu, Jie
dc.contributor.authorMeng, Xianyu
dc.contributor.authorWang, Zhenlong
dc.contributor.authorShan, Debin
dc.contributor.authorGuo, Bin
dc.contributor.authorCao, Jian
dc.date.accessioned2025-01-23T21:17:35Z
dc.date.available2025-01-23T21:17:35Z
dc.date.issued2019
dc.description.abstractThe size effects in metal forming have been found to be crucial in micro-scale plastic deformation or micro-forming processes, which lead to attenuation of the material's formability due to the increasing heterogeneity of the plastic flow. The use of an electric field during micro-scale plastic deformation has shown to relieve size effects, enhance the material's formability, modify the microstructure, etc. Consequently, these electric-assisted (EA) micro-forming processes seem to bring many potential benefits that need to be investigated. Accordingly, here we investigated the influence of an electric field on the size effects to describe the fracture behavior in uniaxial micro-tension tests of an AZ31 alloy with various grain sizes. In order to decouple the thermal-mechanical and microstructure changes, room temperature (RT), oven-heated (OH), air-cooled (AC), and EA uniaxial micro-tension tests were conducted. The size effects contribution on the fracture stress and strain showed a similar trend in all the testing configurations. However, the smallest fracture stresses and the largest fracture strains were denoted in the EA configuration. EBSD examination shows that current-induced dynamic recrystallization (DRX) and texture evolution could be negligible under the studied conditions. The kernel average misorientation (KAM) maps give the larger plastic deformation in the EA specimens due to the reduction of plastic micro-heterogeneity. Finally, the fracture morphology indicates that the current-induced ductility enhancement may be attributed to the arrest of micro-crack propagation and the inhibition of void initiation, growth, and coalescence caused by lattice melting and expansion.
dc.fuente.origenWOS
dc.identifier.doi10.3390/ma12010111
dc.identifier.issn1996-1944
dc.identifier.urihttps://doi.org/10.3390/ma12010111
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/101159
dc.identifier.wosidWOS:000456410200111
dc.issue.numero1
dc.language.isoen
dc.revistaMaterials
dc.rightsacceso restringido
dc.subjectductility
dc.subjectfracture behavior
dc.subjectsize effect
dc.subjectelectrically assisted
dc.subjectmicro-tension
dc.titleCurrent-Induced Ductility Enhancement of a Magnesium Alloy AZ31 in Uniaxial Micro-Tension Below 373 K
dc.typeartículo
dc.volumen12
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas