Influence of inhomogeneity on mechanical properties of commercially pure titanium processed by HPT
Influence of inhomogeneity on mechanical properties of commercially pure titanium processed by HPT
Already for fifteen years many researchers have been trying to discover metallic materials with unusual combinations of strength and ductility: with high strength and enhanced ductility. This combination may be achieved through different ways: alloying, nanostructuring, etc. This report is an attempt to analyze the influence of inhomogeneity of different types (structural, phase and space) on mechanical properties of commercially pure titanium (bulk and powder) subjected to high-pressure torsion. Experimental results for HPT bulk and powder titanium have demonstrated that mechanical behavior of CP titanium strongly depends on phase inhomogeneity (alpha + omega phases), structural inhomogeneity (bimodal grain size distribution) and space inhomogeneity (retained porosity) in case of cold consolidated Ti powder. High strength in HPT bulk titanium due to the formation of hard omega phase during HPT processing at room temperature was detected. The strong omega phase transforms back to nanograined alpha phase domains during short annealing at elevated temperature. HPT consolidation of titanium powder leads to the formation of brittle specimens showing high strength but almost zero plasticity.
284-289
Zhilyaev, Alexandr P.
d053e518-1976-4633-8953-e8f34b9b7c44
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Cabrera, Jose Maria
efaf4de8-97b4-480d-ae9f-7a28f87a2b29
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Zhilyaev, Alexandr P.
d053e518-1976-4633-8953-e8f34b9b7c44
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Cabrera, Jose Maria
efaf4de8-97b4-480d-ae9f-7a28f87a2b29
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Zhilyaev, Alexandr P., Huang, Yi, Cabrera, Jose Maria and Langdon, Terence G.
(2018)
Influence of inhomogeneity on mechanical properties of commercially pure titanium processed by HPT.
Defect and Diffusion Forum, 385, .
(doi:10.4028/www.scientific.net/DDF.385.284).
Abstract
Already for fifteen years many researchers have been trying to discover metallic materials with unusual combinations of strength and ductility: with high strength and enhanced ductility. This combination may be achieved through different ways: alloying, nanostructuring, etc. This report is an attempt to analyze the influence of inhomogeneity of different types (structural, phase and space) on mechanical properties of commercially pure titanium (bulk and powder) subjected to high-pressure torsion. Experimental results for HPT bulk and powder titanium have demonstrated that mechanical behavior of CP titanium strongly depends on phase inhomogeneity (alpha + omega phases), structural inhomogeneity (bimodal grain size distribution) and space inhomogeneity (retained porosity) in case of cold consolidated Ti powder. High strength in HPT bulk titanium due to the formation of hard omega phase during HPT processing at room temperature was detected. The strong omega phase transforms back to nanograined alpha phase domains during short annealing at elevated temperature. HPT consolidation of titanium powder leads to the formation of brittle specimens showing high strength but almost zero plasticity.
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Zhilyaev-DDF-2018 manuscript
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Accepted/In Press date: 21 May 2018
e-pub ahead of print date: 20 July 2018
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Local EPrints ID: 422812
URI: http://eprints.soton.ac.uk/id/eprint/422812
ISSN: 1012-0386
PURE UUID: 0ea9786a-c923-4ad8-a30c-3e361a116c13
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Date deposited: 06 Aug 2018 16:30
Last modified: 16 Mar 2024 04:08
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Author:
Alexandr P. Zhilyaev
Author:
Yi Huang
Author:
Jose Maria Cabrera
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