Mechanical properties of pure titanium and Ti-6Al-4V alloys with a new tailored nano/meso hybrid microstructure
| Autor: | Kei Ameyama, Tatsuya Sekiguchi, Hiroshi Fujiwara |
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| Rok vydání: | 2009 |
| Předmět: |
Materials science
Metallurgy Alloy Metals and Alloys chemistry.chemical_element Sintering Core (manufacturing) engineering.material Condensed Matter Physics Microstructure Grain size chemistry Nano Materials Chemistry engineering Physical and Theoretical Chemistry Severe plastic deformation Titanium |
| Zdroj: | International Journal of Materials Research. 100:796-799 |
| ISSN: | 2195-8556 1862-5282 |
| DOI: | 10.3139/146.110116 |
| Popis: | Pure titanium and Ti-6Al-4V alloy powders are treated by a mechanical milling process, which is one of the severe plastic deformation processes. The mechanical milling enables to produce a nano-grain microstructure very easily and has been applied to many powder materials. The bimodal microstructure in those mechanically milled powders is composed of a nano-grain structure with a grain size of about 50 nm in the surface-near region and of a work-hardened microstructure in the core region of the powder. We applied the hot roll sintering process to pure titanium and to Ti-6Al-4V mechanically milled powders. These compacts have a hybrid microstructure that consists of nano-grain structure with grain sizes of 200 to 500 nm and a micron size meso-grain structure. The hybrid microstructure materials demonstrate enhanced mechanical properties compared to conventional materials. |
| Databáze: | OpenAIRE |
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