Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/53392
Registo completo
Campo DC | Valor | Idioma |
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dc.contributor.author | Alves, J. L. | por |
dc.contributor.author | Oliveira, M. C. | por |
dc.contributor.author | Menezes, L. F. | por |
dc.contributor.author | Cazacu, Oana | por |
dc.date.accessioned | 2018-03-23T20:25:00Z | - |
dc.date.available | 2018-03-23T20:25:00Z | - |
dc.date.issued | 2017 | - |
dc.identifier.issn | 0870-8312 | por |
dc.identifier.uri | https://hdl.handle.net/1822/53392 | - |
dc.description.abstract | The influence of the tension-compression asymmetry of the plastic flow, due to intrinsic single-crystal deformation mechanisms, on porosity evolution and the overall ductility of voided metallic polycrystals is assessed. To this end, detailed micromechanical finite-element analyses of three-dimensional unit cells containing a single initially spherical cavity are carried out. The plastic flow of the matrix (fully-dense material) is described by a criterion that accounts for strength-differential effects induced by deformation twinning of the constituent grains of the metallic polycrystalline materials. The dilatational response of porous polycrystals are calculated for macroscopic axisymmetric tensile loadings corresponding to a fixed value of the stress triaxiality and the two possible values of the Lode parameter. It is shown that damage accumulation, and ultimately ductility of the porous polycrystals are markedly different as compared to the case when the matrix is governed by von Mises criterion. Most importantly, a direct correlation is established between the macroscopic material parameter k that is intimately related to the particularities of the plastic flow of the matrix and the rate of damage accumulation. (C) 2017 Portuguese Society of Materials (SPM). Published by Elsevier Espana, S.L.U.. All rights reserved. | por |
dc.description.sponsorship | The authors gratefully acknowledge the financial support of the Portuguese Foundation for Science and Technology (FCT) via the project PTDC/EMETEC/1805/2012.This work has been supported by FCT (Fundacao para a Ciencia e Tecnologia) in the scope of the project UID/EEA/04436/2013. | por |
dc.language.iso | eng | por |
dc.publisher | Elsevier España | por |
dc.relation | info:eu-repo/grantAgreement/FCT/5876-PPCDTI/127168/PT | por |
dc.relation | info:eu-repo/grantAgreement/FCT/COMPETE/127168/PT | por |
dc.relation | info:eu-repo/grantAgreement/FCT/5876/147325/PT | por |
dc.rights | openAccess | por |
dc.subject | Twinning | por |
dc.subject | porous polycrystals | por |
dc.subject | porosity evolution | por |
dc.subject | ductility | por |
dc.title | The role of tension-compression asymmetry of the plastic flow on ductility and damage accumulation of porous polycrystals | por |
dc.type | article | - |
dc.peerreviewed | yes | por |
oaire.citationStartPage | E234 | por |
oaire.citationEndPage | E238 | por |
oaire.citationIssue | 1 | por |
oaire.citationVolume | 29 | por |
dc.date.updated | 2018-03-23T20:11:18Z | - |
dc.identifier.doi | 10.1016/j.ctmat.2016.06.006 | por |
dc.description.publicationversion | info:eu-repo/semantics/publishedVersion | por |
dc.subject.wos | Science & Technology | - |
sdum.export.identifier | 4775 | - |
sdum.journal | Ciência & Tecnologia dos Materiais | por |
Aparece nas coleções: | DEM - Artigos em revistas de circulação internacional com arbitragem científica |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Materiais2015_Alves_paper_2pages.pdf | 385,2 kB | Adobe PDF | Ver/Abrir |