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| Title: | Influence of inhomogeneity on mechanical properties of commercially pure titanium processed by HPT |
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| Author: | Zhilyaev, Alexander P.; Huang, Yi; Cabrera Marrero, José M.; Langdon, T. G. |
| Other authors: | 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: | 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: | Peer Reviewed |
| Subject(s): | -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: | Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
| Document type: | Article - Submitted version Article |
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