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Ultrahigh hardness and biocompatibility of high-entropy alloy TiAlFeCoNi processed by high-pressure torsion

dc.contributor.authorEdalati, Parisa
dc.contributor.authorFloriano, Ricardo
dc.contributor.authorTang, Yongpeng
dc.contributor.authorMohammadi, Abbas
dc.contributor.authorPereira, Karina Danielle [UNESP]
dc.contributor.authorLuchessi, Augusto Ducati [UNESP]
dc.contributor.authorEdalati, Kaveh
dc.contributor.institutionKyushu University
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2020-12-12T01:19:41Z
dc.date.available2020-12-12T01:19:41Z
dc.date.issued2020-07-01
dc.description.abstractDespite significant studies on mechanical properties of high-entropy alloys (HEAs), there have been limited attempts to examine the biocompatibility of these alloys. In this study, a lattice-softened high-entropy alloy TiAlFeCoNi with ultrahigh hardness (examined by Vickers method), low elastic modulus (examined by nanoindentation) and superior activity for cell proliferation/viability/cytotoxicity (examined by MTT assay) was developed by employing imperial data and thermodynamic calculations. The designated alloy after casting was processed further by high-pressure torsion (HPT) to improve its hardness via the introduction of nanograins, dislocations and order-disorder transformation. The TiAlFeCoNi alloy with the L21-BCC crystal structure exhibited 170–580% higher hardness and 260–1020% better cellular metabolic activity compared to titanium and Ti-6Al-7Nb biomaterials, suggesting the high potential of HEAs for future biomedical applications.en
dc.description.affiliationWPI International Institute for Carbon-Neutral Energy Research (WPI-I2CNER) Kyushu University
dc.description.affiliationSchool of Applied Sciences University of Campinas (UNICAMP)
dc.description.affiliationInstitute of Biosciences São Paulo State University (UNESP)
dc.description.affiliationUnespInstitute of Biosciences São Paulo State University (UNESP)
dc.description.sponsorshipMinistry of Education, Culture, Sports, Science and Technology
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipInstituto Serrapilheira
dc.description.sponsorshipIdMinistry of Education, Culture, Sports, Science and Technology: 19H05176
dc.description.sponsorshipIdFAPESP: 2013/23620-4
dc.description.sponsorshipIdFAPESP: 2018/15968-4
dc.description.sponsorshipIdInstituto Serrapilheira: Serra-1709-17362
dc.identifierhttp://dx.doi.org/10.1016/j.msec.2020.110908
dc.identifier.citationMaterials Science and Engineering C, v. 112.
dc.identifier.doi10.1016/j.msec.2020.110908
dc.identifier.issn1873-0191
dc.identifier.issn0928-4931
dc.identifier.scopus2-s2.0-85082770183
dc.identifier.urihttp://hdl.handle.net/11449/198698
dc.language.isoeng
dc.relation.ispartofMaterials Science and Engineering C
dc.sourceScopus
dc.subjectBiomaterials
dc.subjectCALPHAD (calculation of phase diagram) method
dc.subjectHigh-entropy alloys (HEAs)
dc.subjectLattice softening
dc.subjectPhase transformation
dc.subjectSevere plastic deformation (SPD)
dc.titleUltrahigh hardness and biocompatibility of high-entropy alloy TiAlFeCoNi processed by high-pressure torsionen
dc.typeArtigo
dspace.entity.typePublication

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