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Article: Phase transformation during aging and resulting mechanical properties of two Ti-Nb-Ta-Zr alloys

TitlePhase transformation during aging and resulting mechanical properties of two Ti-Nb-Ta-Zr alloys
Authors
KeywordsMetastable β titanium alloy
Young's modulus
Phase transformation
Mechanical properties
Issue Date2005
Citation
Materials Science and Technology, 2005, v. 21, n. 6, p. 678-686 How to Cite?
AbstractPhase transformations and mechanical properties of both Ti-29Nb-13Ta-4·6Zr and Ti-39Nb-13Ta-4·6Zr (wt-%) alloys were investigated. The microstructure of the 29Nb alloy is sensitive to solution and aging treatment. Ice water quenching from the solution treatment temperature resulted in (β+α″) microstructure but air or furnace cooling led to a mixture of (β+ω). The formation of the orthorhombic α″ martensite thus suppresses ω formation in the ice water quenched 29Nb alloy, Cooling rate from the solution treatment temperature also has a significant effect on the formation of α and ω phases during subsequent isothermal aging below the ω start temperature: slow cooling enhances ω but depresses α formation. This cooling rate dependence of aged microstructure was attributed to α″ martensite acting as precursor of thus phase, thus providing a low energy path to the precipitation of α at the expense of ω. Phase transformation in the 39Nb alloy is more sluggish than that in the 29Nb alloy, owing to the presence of the higher content of β stabiliser Nb. For the 29Nb alloy, Young's modulus and mechanical properties are sensitive to the fraction of phases, and change significantly during aging, in contrast with the 39Nb alloy. © 2005 Institute of Materials, Minerals and Mining.
Persistent Identifierhttp://hdl.handle.net/10722/263059
ISSN
2020 Impact Factor: 1.92
2020 SCImago Journal Rankings: 0.606
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLi, S. J.-
dc.contributor.authorYang, R.-
dc.contributor.authorNiinomi, M.-
dc.contributor.authorHao, Y. L.-
dc.contributor.authorCui, Y. Y.-
dc.contributor.authorGuo, Z. X.-
dc.date.accessioned2018-10-08T09:29:13Z-
dc.date.available2018-10-08T09:29:13Z-
dc.date.issued2005-
dc.identifier.citationMaterials Science and Technology, 2005, v. 21, n. 6, p. 678-686-
dc.identifier.issn0267-0836-
dc.identifier.urihttp://hdl.handle.net/10722/263059-
dc.description.abstractPhase transformations and mechanical properties of both Ti-29Nb-13Ta-4·6Zr and Ti-39Nb-13Ta-4·6Zr (wt-%) alloys were investigated. The microstructure of the 29Nb alloy is sensitive to solution and aging treatment. Ice water quenching from the solution treatment temperature resulted in (β+α″) microstructure but air or furnace cooling led to a mixture of (β+ω). The formation of the orthorhombic α″ martensite thus suppresses ω formation in the ice water quenched 29Nb alloy, Cooling rate from the solution treatment temperature also has a significant effect on the formation of α and ω phases during subsequent isothermal aging below the ω start temperature: slow cooling enhances ω but depresses α formation. This cooling rate dependence of aged microstructure was attributed to α″ martensite acting as precursor of thus phase, thus providing a low energy path to the precipitation of α at the expense of ω. Phase transformation in the 39Nb alloy is more sluggish than that in the 29Nb alloy, owing to the presence of the higher content of β stabiliser Nb. For the 29Nb alloy, Young's modulus and mechanical properties are sensitive to the fraction of phases, and change significantly during aging, in contrast with the 39Nb alloy. © 2005 Institute of Materials, Minerals and Mining.-
dc.languageeng-
dc.relation.ispartofMaterials Science and Technology-
dc.subjectMetastable β titanium alloy-
dc.subjectYoung's modulus-
dc.subjectPhase transformation-
dc.subjectMechanical properties-
dc.titlePhase transformation during aging and resulting mechanical properties of two Ti-Nb-Ta-Zr alloys-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1179/174328405X43108-
dc.identifier.scopuseid_2-s2.0-21944435861-
dc.identifier.volume21-
dc.identifier.issue6-
dc.identifier.spage678-
dc.identifier.epage686-
dc.identifier.isiWOS:000230594300008-
dc.identifier.issnl0267-0836-

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