Show simple item record

dc.contributor.authorHanna, Abdelkader
dc.contributor.authorAzzeddine, Hiba
dc.contributor.authorCabrera Marrero, José M.
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica
dc.date.accessioned2019-06-14T08:51:59Z
dc.date.available2020-05-31T00:25:56Z
dc.date.issued2019-05
dc.identifier.citationHanna, A.; Azzeddine, H.; Cabrera, J. An investigation of the thermal stability of a Mg-Dy alloy after processing by high-pressure torsion. "Materials characterization", Maig 2019, vol. 151, p. 519-529.
dc.identifier.issn1044-5803
dc.identifier.urihttp://hdl.handle.net/2117/134455
dc.description.abstractAn Mg-0.41Dy (wt%) alloy was successfully processed by high-pressure tension (HPT) through 5 turns at room temperature. The evolution of the recrystallization microstructure and the texture and mechanical properties of the deformed alloy were investigated after annealing at 200 and 400¿°C for 1¿h using Electron Backscatter Diffraction (EBSD) and Vickers measurements. The recrystallization temperature and activation energy were evaluated using Differential Scanning Calorimetry (DSC). Processing by HPT led to significant grain refinement with an average grain size of ~0.5¿±¿0.1¿µm which increased to ~1.2¿±¿0.8¿µm after annealing at 400¿°C. This slow increase in grain size at a high temperature demonstrates a good thermal stability of the microstructure. The alloy exhibited two main fiber textures after HPT processing: firstly a typical basal fiber (f1¿=¿0–360°, F¿=¿0° and f2¿=¿0–60°) and secondly a fiber localized at f1¿=¿180°, F¿=¿60° and f2¿=¿0–90°. These textures were retained after annealing at 400¿°C. There was no change in the microhardness value after annealing at 200¿°C (41¿±¿1 Hv) and only a minor decrease after annealing at 400¿°C (38.4¿±¿0.5 Hv). The DSC results showed that the temperature associated with the recrystallization process increased with increasing heating rate and the activation energy for recrystallization was measured as ~25¿kJ¿mol-1.
dc.format.extent11 p.
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials
dc.subject.lcshMicrostructure
dc.subject.otherDSC
dc.subject.otherHPT
dc.subject.otherMg-Dy alloy
dc.subject.otherMicrostructure
dc.subject.otherRecrystallization
dc.subject.otherTexture
dc.titleAn investigation of the thermal stability of a Mg-Dy alloy after processing by high-pressure torsion
dc.typeArticle
dc.subject.lemacRecristal·lització (Metal·lúrgia)
dc.subject.lemacMicroestructura
dc.contributor.groupUniversitat Politècnica de Catalunya. PROCOMAME - Processos de Conformació de Materials Metàl·lics
dc.identifier.doi10.1016/j.matchar.2019.03.040
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S1044580319300403
dc.rights.accessOpen Access
local.identifier.drac25142910
dc.description.versionPostprint (published version)
local.citation.authorHanna, A.; Azzeddine, H.; Cabrera, J.
local.citation.publicationNameMaterials characterization
local.citation.volume151
local.citation.startingPage519
local.citation.endingPage529


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record