Publication:
Texture and microstructural changes after thermal cycling of 6061Al-20vol%SiCw metal matrix composite: The role of microscopic internal stresses

dc.affiliation.dptoUC3M. Departamento de Físicaes
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Materiales Nano-Estructurados y Multifuncionaleses
dc.contributor.authorEddahbi, Mohamed Ou Lahcen
dc.contributor.authorFernández, Ricardo
dc.contributor.authorLlorente, I.
dc.contributor.authorGonzález Doncel, Gaspar
dc.contributor.funderComunidad de Madrides
dc.contributor.funderMinisterio de Economía y Competitividad (España)es
dc.date.accessioned2023-04-18T10:16:44Z
dc.date.available2023-04-18T10:16:44Z
dc.date.issued2022-12-01
dc.description.abstractThe dramatic texture and microstructural changes observed in 6061Al-20vol%SiCw metal matrix composite undergoing severe thermal cycles, under the absence and the simultaneous action of an external tensile stress, are studied. Under only thermal cycles (100–450 °C) homogenization and disorientation of the SiC whisker reinforcement and crystallographic texture randomization occurs. However, when a simultaneous tensile stress is applied, the whiskers rotate so that their long direction aligns with the tensile axes. Furthermore, a strong texture and large deformations (superplasticity), higher than 1000%, are achieved. These results are explained on the basis of the microscopic stress fields generated at the different microstructural scales (stresses of type II and type III) and well-known observation of dislocation generation at the SiC-metal interface during the cooling period of the cycles. We propose that moving dislocations (responsible of type III stresses) operate differently under the absence or the presence of the external stress. Under no stress, dislocation motion (occurring mainly during the heating period) is driven only by the type II internal stress. However, dislocation motion is improved when an external stress is applied, leading to texture changes and large elongations. Despite that a low external stress is applied, it overcomes the effect of the internal stresses for dislocation motion.en
dc.description.sponsorshipProjects Micro-Stress-MAP Y2018/NMT-4668 from Comunidad Autónoma de Madrid, and MAT2017-83825-C4-1-R and TECNOFUSIÓN(III)-CM S2018/EMT-4437, from MINECO, Spain.en
dc.format.extent8es
dc.identifier.bibliographicCitationEddahbi, M., Fernández, R., Llorente, I., & González-Doncel, G. (2022). Texture and microstructural changes after thermal cycling of 6061Al-20vol%SiCw metal matrix composite: The role of microscopic internal stresses. Materials Today. Communications, 33(104914), 104914.en
dc.identifier.doihttps://doi.org/10.1016/j.mtcomm.2022.104914
dc.identifier.issn2352-4928
dc.identifier.publicationfirstpage1es
dc.identifier.publicationlastpage8es
dc.identifier.publicationtitleMaterials Today Communicationsen
dc.identifier.publicationvolume33es
dc.identifier.urihttps://hdl.handle.net/10016/37117
dc.identifier.uxxiAR/0000032508
dc.language.isoengen
dc.publisherElsevieren
dc.relation.projectIDComunidad de Madrid. S2018/EMT-4437es
dc.relation.projectIDComunidad de Madrid. Y2018/NMT-4668es
dc.relation.projectIDGobierno de España. MAT2017-83825-C4-1-Res
dc.rights© 2022 The Author(s). Published by Elsevier Ltd.en
dc.rightsThis is an open access article under the CCBY license (http://creativecommons.org/licenses/by/4.0/)en
dc.rightsAtribución 3.0 España*
dc.rights.accessRightsopen accessen
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/*
dc.subject.ecienciaFísicaes
dc.subject.ecienciaMaterialeses
dc.subject.otherMetal matrix compositesen
dc.subject.otherThermal cyclingen
dc.subject.otherTextureen
dc.subject.otherMicrostructureen
dc.subject.otherMicroscopic internal stressesen
dc.titleTexture and microstructural changes after thermal cycling of 6061Al-20vol%SiCw metal matrix composite: The role of microscopic internal stressesen
dc.typeresearch article*
dc.type.hasVersionVoR*
dspace.entity.typePublication
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