Title:
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Influence of inhomogeneity on mechanical properties of commercially pure titanium processed by HPT
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Author:
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Zhilyaev, Alexander P.; Huang, Yi; Cabrera Marrero, José M.; Langdon, T. G.
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. PROCOMAME - Processos de Conformació de Materials Metàl·lics |
Abstract:
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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 ti
tanium (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 inhomoge
neity (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 |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria dels materials -Titanium -Microstructure -Materials--Mechanical properties -High pressure torsion
Ultrafine-Grained Materials
Titanium
Microstructure
Mechanical Properties -Titani -Microestructura -Materials -- Propietats mecàniques |
Rights:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Document type:
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Article - Submitted version Article |
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