Hexagonal martensite decomposition and phase precipitation in Ti-Cu alloys

dc.creatorCardoso, FF
dc.creatorCremasco, A
dc.creatorContieri, RJ
dc.creatorLopes, ESN
dc.creatorAfonso, CRM
dc.creatorCaram, R
dc.date2011
dc.dateSEP
dc.date2014-07-30T17:49:50Z
dc.date2015-11-26T18:07:06Z
dc.date2014-07-30T17:49:50Z
dc.date2015-11-26T18:07:06Z
dc.date.accessioned2018-03-29T00:49:14Z
dc.date.available2018-03-29T00:49:14Z
dc.identifierMaterials & Design. Elsevier Sci Ltd, v. 32, n. 41890, n. 4608, n. 4613, 2011.
dc.identifier0261-3069
dc.identifierWOS:000292621000064
dc.identifier10.1016/j.matdes.2011.03.040
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/68310
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/68310
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1293508
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionThe mechanical behavior of Ti-Cu alloys can be improved by controlling Ti(2)Cu precipitation. In eutectoid alloys, such precipitation can be achieved by the decomposition of martensite in response to aging heat treatment. The purpose of this work is to discuss the evolution of precipitates during the decomposition of hexagonal martensite in Ti-Cu alloys. First, samples with near-eutectoid compositions were prepared in an arc furnace equipped with a non-consumable tungsten electrode and water-cooled copper hearth under a high purity argon atmosphere. After chemical homogenization at a temperature in the beta field, the samples were water-quenched and examined by differential scanning calorimetry and high-temperature X-ray diffraction. The results indicate that rapidly quenched near-eutectoid Ti-Cu alloys present Ti(2)Cu precipitates. Regardless of the cooling rate applied, such precipitation is unavoidable. No evidence of beta phase stabilization was found in the rapidly quenched samples. Precipitation temperatures of coherent and incoherent phases of 415 degrees C and 550 degrees C, respectively, were determined from the differential scanning calorimetry measurements. Ti(2)Cu precipitation was examined in situ by high temperature X-ray diffraction experiments. The total decay of martensite was found to occur above 575 degrees C. Vickers hardness testing of aged samples revealed a correlation between phase precipitation and hardening. (C) 2011 Elsevier Ltd. All rights reserved.
dc.description32
dc.description41890
dc.description4608
dc.description4613
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageen
dc.publisherElsevier Sci Ltd
dc.publisherOxford
dc.publisherInglaterra
dc.relationMaterials & Design
dc.relationMater. Des.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectMechanical-properties
dc.subjectElectron-microscopy
dc.subjectBeta-phase
dc.subjectD-metals
dc.titleHexagonal martensite decomposition and phase precipitation in Ti-Cu alloys
dc.typeArtículos de revistas


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