Structure, phase composition and mechanical properties in bioinert zirconium-based alloy after severe plastic deformation
| Parent link: | Письма о материалах=Letters on Materials/ Российская академия наук (РАН), Институт проблем сверхпластичности металлов (ИПСМ).— , 2011- Т. 7, № 4 (28).— 2017.— [С. 469-472] |
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| Altres autors: | , , , , , |
| Sumari: | Заглавие с экрана Текст на английском языке Bioinert Zr-1Nb alloy, which is a prospective material for the fabrication of implants for different applications, is studied. Annealed billets of the alloys are subjected to severe plastic deformation including multi-cycle abc-pressing and multipass rolling in grooved rolls. The abc-pressing stage involves three cycles of pressing within the temperature range 500-400°C with one pressing in each cycle at a given temperature. In the second stage, the billets are deformed through rolling in grooved rolls at room temperature. Rolling in grooved rolls provided the formation of a homogeneous structure throughout the bulk billet volume and additional grain refinement. After annealing the alloy had a fine-grained structure consisting of 2.8 µm sized equiaxial [alpha]-Zr matrix grains and 0.4 µm sized [beta]-Nb particles distributed on the boundaries and interiors of [alpha]-Zr matrix grains. As a result of severe plastic deformation, a binary ultrafine-grained alloy with 0.2 µm size of structural elements was obtained. Transmission electron microscopy shows that the microstructure of the alloy consists of [alpha]-Zr grains, while [beta]-Nb phase grains are not identified structurally or via X-ray diffraction. Only the diffraction identification analysis reveals the presence of [beta]-Nb in the alloy. Ultrafine-grained structure enhances the mechanical properties of the alloys: yield stress 450 MPa, ultimate tensile strength 780 MPa, and microhardness 2800 MPa are obtained while keeping a low value of Young's modulus (51 MPa) comparable to the Young's modulus of bone tissue. Режим доступа: по договору с организацией-держателем ресурса |
| Idioma: | anglès |
| Publicat: |
2017
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| Matèries: | |
| Accés en línia: | https://www.elibrary.ru/item.asp?id=32253343 https://doi.org/10.22226/2410-3535-2017-4-469-472 |
| Format: | Electrònic Capítol de llibre |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=665401 |