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Article: Phase transformation during aging and resulting mechanical properties of two Ti-Nb-Ta-Zr alloys
Title | Phase transformation during aging and resulting mechanical properties of two Ti-Nb-Ta-Zr alloys |
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Authors | |
Keywords | Metastable β titanium alloy Young's modulus Phase transformation Mechanical properties |
Issue Date | 2005 |
Citation | Materials Science and Technology, 2005, v. 21, n. 6, p. 678-686 How to Cite? |
Abstract | Phase 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 Identifier | http://hdl.handle.net/10722/263059 |
ISSN | 2023 Impact Factor: 1.7 2023 SCImago Journal Rankings: 0.421 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Li, S. J. | - |
dc.contributor.author | Yang, R. | - |
dc.contributor.author | Niinomi, M. | - |
dc.contributor.author | Hao, Y. L. | - |
dc.contributor.author | Cui, Y. Y. | - |
dc.contributor.author | Guo, Z. X. | - |
dc.date.accessioned | 2018-10-08T09:29:13Z | - |
dc.date.available | 2018-10-08T09:29:13Z | - |
dc.date.issued | 2005 | - |
dc.identifier.citation | Materials Science and Technology, 2005, v. 21, n. 6, p. 678-686 | - |
dc.identifier.issn | 0267-0836 | - |
dc.identifier.uri | http://hdl.handle.net/10722/263059 | - |
dc.description.abstract | Phase 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.language | eng | - |
dc.relation.ispartof | Materials Science and Technology | - |
dc.subject | Metastable β titanium alloy | - |
dc.subject | Young's modulus | - |
dc.subject | Phase transformation | - |
dc.subject | Mechanical properties | - |
dc.title | Phase transformation during aging and resulting mechanical properties of two Ti-Nb-Ta-Zr alloys | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1179/174328405X43108 | - |
dc.identifier.scopus | eid_2-s2.0-21944435861 | - |
dc.identifier.volume | 21 | - |
dc.identifier.issue | 6 | - |
dc.identifier.spage | 678 | - |
dc.identifier.epage | 686 | - |
dc.identifier.isi | WOS:000230594300008 | - |
dc.identifier.issnl | 0267-0836 | - |