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Enhanced mechanical response of an ultrafine grained Ti-6Al-4V alloy produced through warm symmetric and asymmetric rolling

Chao, Qi, Cizek, Pavel, Wang, Jiangting, Hodgson, Peter D. and Beladi, Hossein 2016, Enhanced mechanical response of an ultrafine grained Ti-6Al-4V alloy produced through warm symmetric and asymmetric rolling, Materials science and engineering a, vol. 650, pp. 404-413, doi: 10.1016/j.msea.2015.10.061.

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Title Enhanced mechanical response of an ultrafine grained Ti-6Al-4V alloy produced through warm symmetric and asymmetric rolling
Author(s) Chao, Qi
Cizek, Pavel
Wang, JiangtingORCID iD for Wang, Jiangting orcid.org/0000-0002-8171-6291
Hodgson, Peter D.
Beladi, Hossein
Journal name Materials science and engineering a
Volume number 650
Start page 404
End page 413
Total pages 10
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2016-01-05
ISSN 0921-5093
Keyword(s) Science & Technology
Technology
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Science & Technology - Other Topics
Materials Science
Titanium alloys
Asymmetric rolling
Grain refinement
Mechanical properties
Crystallographic texture
SEVERE PLASTIC-DEFORMATION
2-PHASE TITANIUM-ALLOY
TI-6AL-4V ALLOY
SUBMICROCRYSTALLINE STRUCTURE
VARIANT SELECTION
ALPHA-PHASE
TEXTURE
MICROSTRUCTURE
MARTENSITE
FATIGUE
Summary An equiaxed ultrafine-grained (UFG) microstructure was successfully produced in a Ti-6Al-4V alloy with an average grain size of 110-230. nm through symmetric and asymmetric warm rolling of a martensitic starting microstructure. The UFG material displayed a combination of ultrahigh strength and ductility at room temperature. Compared with the conventional symmetric rolling, the asymmetric rolling process led to a more pronounced effect of microstructure refinement and a higher tensile ductility. The optimum mechanical response was obtained though the asymmetric rolling at 70% reduction, offering an ultimate tensile strength of 1365. MPa and a total elongation of ~23%. Apart from the magnitude of grain refinement, the inclination of basal texture component from the normal towards the rolling direction during asymmetric rolling and possible strain induced β to martensite transformation may concurrently contribute to a remarkable tensile strength-ductility balance.
Language eng
DOI 10.1016/j.msea.2015.10.061
Field of Research 091207 Metals and Alloy Materials
0912 Materials Engineering
0913 Mechanical Engineering
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30081117

Document type: Journal Article
Collection: Institute for Frontier Materials
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