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Microstructure formation and mechanical properties of isothermally-solidified titanium alloy joints brazed by a Ti - Zr - Cu - Ni - Be amorphous alloy foil

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dc.contributor.authorMorokhov, P. V.
dc.contributor.authorIvannikov, А. A.
dc.contributor.authorPopov, N. S.
dc.contributor.authorSevryukov, O. N.
dc.contributor.authorМорохов, Павел Владимирович
dc.contributor.authorИванников, Александр Александрович
dc.contributor.authorПопов, Никита Сергеевич
dc.contributor.authorСеврюков, Олег Николаевич
dc.date.accessioned2024-11-27T16:01:13Z
dc.date.available2024-11-27T16:01:13Z
dc.date.issued2020
dc.description.abstractTwo titanium alloys, OT4 and VT6-c, with a pseudo-alpha and alpha + beta structure, respectively, were brazed using transient liquid phase (TLP) bonding. To obtain high strength joints an amorphous foil (Ti - 12Zr - 22Cu - 12Ni - 1.5 Be - 0.8V wt.%) was used. Based on microstructural studies and analysis of two- and three-component phase diagrams, the mechanism of the microstructural evolution of the brazed seams of titanium alloys OT4 and VT6-c is described. Brazing at 800 oC with exposure for 0.5 h leads to the formation of a heterogeneous structure consisting of Widmanstatten, eutectoid, and eutectic. Brazed OT4 and VT6-c joints with the presence of a eutectic layer in the centre show low mechanical properties; their ultimate strength lies in a range from 200 to 550 MPa. Increasing the brazing temperature to 840 degrees C and the exposure time to 2 h, leads to the disappearance of the brittle eutectic component from the seam. This structure typically consists of Widmanstatten with a small number of eutectoid fractions. Joints with the absence of a eutectic layer in the brazed seam demonstrate a strength equal to the base titanium alloys. In this case, failure occurs in the base metal. For brazed samples from the OT4 alloy, the tensile strength value is sigma(b) = 750 +/- 3 MPa, and for samples from VT6- c, sigma(b) = 905 +/- 3 MPa.
dc.format.extentС. 63-72
dc.identifier.citationMicrostructure formation and mechanical properties of isothermally-solidified titanium alloy joints brazed by a Ti - Zr - Cu - Ni - Be amorphous alloy foil / Morokhov, PV [et al.] // Non-ferrous Metals. - 2020. - № 2. - P. 63-72. - 10.17580/nfm.2020.02.08
dc.identifier.doi10.17580/nfm.2020.02.08
dc.identifier.urihttps://www.doi.org/10.17580/nfm.2020.02.08
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85100850011&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000604746400008
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/23048
dc.relation.ispartofNon-ferrous Metals
dc.titleMicrostructure formation and mechanical properties of isothermally-solidified titanium alloy joints brazed by a Ti - Zr - Cu - Ni - Be amorphous alloy foil
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue2
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