Orientation dependence of superelasticity in quenched high-nickel Ti51.8Ni single crystals

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Orientation dependence of superelasticity in quenched high-nickel Ti51.8Ni single crystals	1 MB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.1016/j.matlet.2020.128677

Title: Orientation dependence of superelasticity in quenched high-nickel Ti51.8Ni single crystals
Creator: Timofeeva, Ekaterina E.
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Panchenko, Elena Yu.
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Tagiltsev, Anton I.
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Larchenkova, N. G.
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Tokhmetova, A. B.
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Chumlyakov, Yuri I.
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Volochaev, M. N.
Date: 2021
DOI: 10.1016/j.matlet.2020.128677
Description: 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-B190 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 r > 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 B190 -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.