Effect of molybdenum on structure, microstructure and mechanical properties of biomedical Ti-20Zr-Mo alloys

Detalhes bibliográficos
Autor(a) principal: Kuroda, Pedro Akira Bazaglia [UNESP]
Data de Publicação: 2016
Outros Autores: Buzalaf, Marília Afonso Rabelo, Grandini, Carlos Roberto [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1016/j.msec.2016.05.053
http://hdl.handle.net/11449/178038
Resumo: Titanium has an allotropic transformation around 883 °C. Below this temperature, the crystalline structure is hexagonal close-packed (α phase), changing to body-centered cubic (β phase). Zirconium has the same allotropic transformation around 862 °C. Molybdenum has body-centered cubic structure, being a strong β-stabilizer for the formation of titanium alloys. In this paper, the effect of substitutional molybdenum was analyzed on the structure, microstructure and selected mechanical properties of Ti-20 Zr-Mo (wt%) alloys to be used in biomedical applications. The samples were prepared by arc-melting and characterized by x-ray diffraction with subsequent refinement by the Rietveld method, optical and scanning electron microscopy. The mechanical properties were analyzed by Vickers microhardness and dynamic elasticity modulus. X-ray measurements and Rietveld analysis revealed the presence of α′ phase without molybdenum, α′ + α″ phases with 2.5 wt% of molybdenum, α″ + β phases with 5 and 7.5 wt% of molybdenum, and only β phase with 10 wt% of molybdenum. These results were corroborated by microscopy results, with a microstructure composed of grains of β phase and lamellae and needles of α′ and α″ phase in intra-grain the region. The hardness of the alloy was higher than the commercially pure titanium, due to the action of zirconium and molybdenum as hardening agents. The samples have a smaller elasticity modulus than the commercially pure titanium.
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spelling Effect of molybdenum on structure, microstructure and mechanical properties of biomedical Ti-20Zr-Mo alloysBiomaterialMicrostructureTitanium alloysTitanium has an allotropic transformation around 883 °C. Below this temperature, the crystalline structure is hexagonal close-packed (α phase), changing to body-centered cubic (β phase). Zirconium has the same allotropic transformation around 862 °C. Molybdenum has body-centered cubic structure, being a strong β-stabilizer for the formation of titanium alloys. In this paper, the effect of substitutional molybdenum was analyzed on the structure, microstructure and selected mechanical properties of Ti-20 Zr-Mo (wt%) alloys to be used in biomedical applications. The samples were prepared by arc-melting and characterized by x-ray diffraction with subsequent refinement by the Rietveld method, optical and scanning electron microscopy. The mechanical properties were analyzed by Vickers microhardness and dynamic elasticity modulus. X-ray measurements and Rietveld analysis revealed the presence of α′ phase without molybdenum, α′ + α″ phases with 2.5 wt% of molybdenum, α″ + β phases with 5 and 7.5 wt% of molybdenum, and only β phase with 10 wt% of molybdenum. These results were corroborated by microscopy results, with a microstructure composed of grains of β phase and lamellae and needles of α′ and α″ phase in intra-grain the region. The hardness of the alloy was higher than the commercially pure titanium, due to the action of zirconium and molybdenum as hardening agents. The samples have a smaller elasticity modulus than the commercially pure titanium.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)UNESP Univ Estadual Paulista Laboratório de Anelasticidade e BiomateriaisIBTN/Br-Institute of Biomaterials Tribocorrosion and Nanomedicine, Brazilian BranchUSP Universidade de São Paulo Departamento de Ciências BiológicasUNESP Univ Estadual Paulista Laboratório de Anelasticidade e BiomateriaisUniversidade Estadual Paulista (Unesp)Tribocorrosion and NanomedicineUniversidade de São Paulo (USP)Kuroda, Pedro Akira Bazaglia [UNESP]Buzalaf, Marília Afonso RabeloGrandini, Carlos Roberto [UNESP]2018-12-11T17:28:19Z2018-12-11T17:28:19Z2016-10-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article511-515application/pdfhttp://dx.doi.org/10.1016/j.msec.2016.05.053Materials Science and Engineering C, v. 67, p. 511-515.0928-4931http://hdl.handle.net/11449/17803810.1016/j.msec.2016.05.0532-s2.0-849699168562-s2.0-84969916856.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials Science and Engineering C1,110info:eu-repo/semantics/openAccess2024-04-25T17:39:39Zoai:repositorio.unesp.br:11449/178038Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:40:51.256242Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Effect of molybdenum on structure, microstructure and mechanical properties of biomedical Ti-20Zr-Mo alloys
title Effect of molybdenum on structure, microstructure and mechanical properties of biomedical Ti-20Zr-Mo alloys
spellingShingle Effect of molybdenum on structure, microstructure and mechanical properties of biomedical Ti-20Zr-Mo alloys
Kuroda, Pedro Akira Bazaglia [UNESP]
Biomaterial
Microstructure
Titanium alloys
title_short Effect of molybdenum on structure, microstructure and mechanical properties of biomedical Ti-20Zr-Mo alloys
title_full Effect of molybdenum on structure, microstructure and mechanical properties of biomedical Ti-20Zr-Mo alloys
title_fullStr Effect of molybdenum on structure, microstructure and mechanical properties of biomedical Ti-20Zr-Mo alloys
title_full_unstemmed Effect of molybdenum on structure, microstructure and mechanical properties of biomedical Ti-20Zr-Mo alloys
title_sort Effect of molybdenum on structure, microstructure and mechanical properties of biomedical Ti-20Zr-Mo alloys
author Kuroda, Pedro Akira Bazaglia [UNESP]
author_facet Kuroda, Pedro Akira Bazaglia [UNESP]
Buzalaf, Marília Afonso Rabelo
Grandini, Carlos Roberto [UNESP]
author_role author
author2 Buzalaf, Marília Afonso Rabelo
Grandini, Carlos Roberto [UNESP]
author2_role author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Tribocorrosion and Nanomedicine
Universidade de São Paulo (USP)
dc.contributor.author.fl_str_mv Kuroda, Pedro Akira Bazaglia [UNESP]
Buzalaf, Marília Afonso Rabelo
Grandini, Carlos Roberto [UNESP]
dc.subject.por.fl_str_mv Biomaterial
Microstructure
Titanium alloys
topic Biomaterial
Microstructure
Titanium alloys
description Titanium has an allotropic transformation around 883 °C. Below this temperature, the crystalline structure is hexagonal close-packed (α phase), changing to body-centered cubic (β phase). Zirconium has the same allotropic transformation around 862 °C. Molybdenum has body-centered cubic structure, being a strong β-stabilizer for the formation of titanium alloys. In this paper, the effect of substitutional molybdenum was analyzed on the structure, microstructure and selected mechanical properties of Ti-20 Zr-Mo (wt%) alloys to be used in biomedical applications. The samples were prepared by arc-melting and characterized by x-ray diffraction with subsequent refinement by the Rietveld method, optical and scanning electron microscopy. The mechanical properties were analyzed by Vickers microhardness and dynamic elasticity modulus. X-ray measurements and Rietveld analysis revealed the presence of α′ phase without molybdenum, α′ + α″ phases with 2.5 wt% of molybdenum, α″ + β phases with 5 and 7.5 wt% of molybdenum, and only β phase with 10 wt% of molybdenum. These results were corroborated by microscopy results, with a microstructure composed of grains of β phase and lamellae and needles of α′ and α″ phase in intra-grain the region. The hardness of the alloy was higher than the commercially pure titanium, due to the action of zirconium and molybdenum as hardening agents. The samples have a smaller elasticity modulus than the commercially pure titanium.
publishDate 2016
dc.date.none.fl_str_mv 2016-10-01
2018-12-11T17:28:19Z
2018-12-11T17:28:19Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1016/j.msec.2016.05.053
Materials Science and Engineering C, v. 67, p. 511-515.
0928-4931
http://hdl.handle.net/11449/178038
10.1016/j.msec.2016.05.053
2-s2.0-84969916856
2-s2.0-84969916856.pdf
url http://dx.doi.org/10.1016/j.msec.2016.05.053
http://hdl.handle.net/11449/178038
identifier_str_mv Materials Science and Engineering C, v. 67, p. 511-515.
0928-4931
10.1016/j.msec.2016.05.053
2-s2.0-84969916856
2-s2.0-84969916856.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Materials Science and Engineering C
1,110
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 511-515
application/pdf
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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