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Formation of an ultrafine-grained structure during equal-channel angular pressing of a β-titanium alloy with low phase stability
journal contribution
posted on 2009-06-01, 00:00 authored by Wei XuWei Xu, X Wu, M Calin, M Stoica, J Eckert, K XiaA uniform, well-defined ultrafine-grained structure was attained by equal-channel angular pressing in a metastable Ti67.4Nb24.6Zr5Sn3 β-titanium alloy with low phase stability. In contrast, coarser β grains of several micrometers were yielded upon equivalent plastic strain in a relatively stable Ti73.5Nb19.6Ta4.5Cr2.4 alloy. The pronounced deformation-induced grain refinement is proposed to mainly result both from the stress-assisted β → α″ martensitic and α″ → β backward transformations during severe plastic deformation, and from the interaction between α″ and dislocations in the β phase.
History
Journal
Scripta materialiaVolume
60Issue
11Pagination
1012 - 1015Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
1359-6462Language
EnglishPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2009, Acta Materialia Inc.Usage metrics
Categories
Keywords
Science & TechnologyTechnologyNanoscience & NanotechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringScience & Technology - Other TopicsMaterials ScienceUltrafine-grained microstructureEqual-channel angular pressingGrain refinementβ-titanium alloysbeta-titanium alloysMICROSTRUCTURAL CHARACTERISTICSSTAINLESS-STEELDUCTILITYNANOSTRUCTURESTRANSFORMATIONDEFORMATIONREFINEMENTSTRENGTHCOPPERMechanical EngineeringCondensed Matter Physics
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