High strength and ductility of pure titanium via twin-structure control using cryogenic deformation
| Autor: | Dong Jun Lee, Jeong Hun Lee, Jong Woo Won, Jae Suk Jeong, Yong-Taek Hyun, Jae Keun Hong, Seong-Woo Choi |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Metals and Alloys chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Instability chemistry Mechanics of Materials 0103 physical sciences Ultimate tensile strength Structure control General Materials Science Composite material Deformation (engineering) 0210 nano-technology Ductility Necking Titanium |
| Zdroj: | Scripta Materialia. 178:94-98 |
| ISSN: | 1359-6462 |
| DOI: | 10.1016/j.scriptamat.2019.11.009 |
| Popis: | We controlled the twin structure in pure Ti by deforming it at cryogenic temperature (∼77 K). Numerous thin individual twins were formed in the grains, thereby enabling strong twinning-induced grain refinement. The processed material had an ultrafine-grained microstructure, which greatly increased its strength. Notably, the ductility did not decrease significantly, despite the considerable strengthening, leading to superior tensile properties. This remarkable phenomenon occurred because the twin structure and the relatively small number of dislocations in the processed material enabled high resistance to necking instability. Our finding offers a new microstructural engineering method to achieve excellent tensile properties in pure Ti. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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