Orientation dependence of superelasticity in quenched high-nickel Ti-51.8Ni single crystals
| Autor: | Yu. I. Chumlyakov, A. B. Tokhmetova, N. G. Larchenkova, E. E. Timofeeva, M.N. Volochaev, A. I. Tagiltsev, E. Yu. Panchenko |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Mechanical Engineering фазовое превращение chemistry.chemical_element 02 engineering and technology Slip (materials science) материалы с памятью формы 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Reversible strain Crystallography Nickel Compressive strength chemistry Mechanics of Materials Diffusionless transformation сверхэластичность Pseudoelasticity General Materials Science 0210 nano-technology высоконикелевые монокристаллы |
| Zdroj: | Materials letters. 2021. Vol. 282. P. 128677 (1-4) |
| ISSN: | 0167-577X |
| DOI: | 10.1016/j.matlet.2020.128677 |
| Popis: | The orientation dependence of the functional and mechanical properties of quenched Ti-51.8at.%Ni single crystals, undergoing a strain-glass transition upon cooling/heating was investigated. It was found that a compressive stress above 800 MPa leads to the B2-B19′ martensitic transformation (MT), regardless of orientation. In the high-strength [0 0 1]-orientation, superelasticity (SE) was observed at 203–248 K, with a reversible strain of 2.3%. Degradation of SE at deforming stresses σ > 1000 MPa was associated with the formation of {1 1 3}B2 twins during the reverse MT. In the low-strength 1 1 1 - -orientation, the formation of stress-induced B19′-martensite occurred simultaneously with the plastic deformation of the B2-phase (due to the formation of reorientation bands and dislocation slip) and a reversible strain was not observed. |
| Databáze: | OpenAIRE |
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