Formation of an ultrafine-grained structure during equal-channel angular pressing of a β-titanium alloy with low phase stability

W. Xu; X. Wu; M. Calin; M. Stoica; J. Eckert; K. Xia

doi:10.1016/j.scriptamat.2009.02.043

Formation of an ultrafine-grained structure during equal-channel angular pressing of a β-titanium alloy with low phase stability

W. Xu^*, X. Wu, M. Calin, M. Stoica, J. Eckert, K. Xia

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

76 Citations (Scopus)

Abstract

A uniform, well-defined ultrafine-grained structure was attained by equal-channel angular pressing in a metastable Ti_67.4Nb_24.6Zr₅Sn₃ 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 Ti_73.5Nb_19.6Ta_4.5Cr_2.4 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.

Original language	English
Pages (from-to)	1012-1015
Number of pages	4
Journal	Scripta Materialia
Volume	60
Issue number	11
DOIs	https://doi.org/10.1016/j.scriptamat.2009.02.043
Publication status	Published - Jun 2009
Externally published	Yes

Keywords

β-titanium alloys
Equal-channel angular pressing
Grain refinement
Ultrafine-grained microstructure

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10.1016/j.scriptamat.2009.02.043

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title = "Formation of an ultrafine-grained structure during equal-channel angular pressing of a β-titanium alloy with low phase stability",

abstract = "A 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.",

keywords = "β-titanium alloys, Equal-channel angular pressing, Grain refinement, Ultrafine-grained microstructure",

author = "W. Xu and X. Wu and M. Calin and M. Stoica and J. Eckert and K. Xia",

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T1 - Formation of an ultrafine-grained structure during equal-channel angular pressing of a β-titanium alloy with low phase stability

AU - Xu, W.

AU - Wu, X.

AU - Calin, M.

AU - Stoica, M.

AU - Eckert, J.

AU - Xia, K.

PY - 2009/6

Y1 - 2009/6

N2 - A 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.

AB - A 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.

KW - β-titanium alloys

KW - Equal-channel angular pressing

KW - Grain refinement

KW - Ultrafine-grained microstructure

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DO - 10.1016/j.scriptamat.2009.02.043

M3 - Article

AN - SCOPUS:62849121555

SN - 1359-6462

VL - 60

SP - 1012

EP - 1015

JO - Scripta Materialia

JF - Scripta Materialia

IS - 11

ER -

Formation of an ultrafine-grained structure during equal-channel angular pressing of a β-titanium alloy with low phase stability

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