Study of hydrogen redistribution in Ti49.1Ni50.9 alloy (at %) with nanocrystalline structure by resistometric and durometer methods

Abstract

The electrolytical hydrogenation of TiNi-based alloys with shape memory and super elasticity results in a significant (by 1,5 times) increase in the microhardness of the surface layer. It is shown that the change of microhardness at long-term aging at room temperature in wire samples of Ti_50,1Ni_50,9 (at %) alloy with nanocrystalline structure can be used for estimation of diffusion mobility of hydrogen. On wire samples with different diameters it is shown that the increase in the relative electrical resistance at 83K at long-term aging at room temperature for this alloy is also associated with the diffusion mobility of hydrogen. Estimates of the hydrogen diffusion coefficient D_H show that in nanocrystalline samples Ti_50,1Ni_50,9 (at %) the diffusion mobility of hydrogen is higher than in coarse-grained samples. This is connected with the increased contribution of grain boundary hydrogen diffusion in samples with nanocrystalline structure.

Original language	English
Article number	012125
Journal	Journal of Physics: Conference Series
Volume	1347
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/1347/1/012125
Publication status	Published - 17 Dec 2019
Event	15th International Russian-Chinese Symposium on Advanced Materials and Processes - Sochi, Russian Federation Duration: 16 Oct 2019 → 19 Oct 2019

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1088/1742-6596/1347/1/012125

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title = "Study of hydrogen redistribution in Ti49.1Ni50.9 alloy (at %) with nanocrystalline structure by resistometric and durometer methods",

abstract = "The electrolytical hydrogenation of TiNi-based alloys with shape memory and super elasticity results in a significant (by 1,5 times) increase in the microhardness of the surface layer. It is shown that the change of microhardness at long-term aging at room temperature in wire samples of Ti50,1Ni50,9 (at %) alloy with nanocrystalline structure can be used for estimation of diffusion mobility of hydrogen. On wire samples with different diameters it is shown that the increase in the relative electrical resistance at 83K at long-term aging at room temperature for this alloy is also associated with the diffusion mobility of hydrogen. Estimates of the hydrogen diffusion coefficient DH show that in nanocrystalline samples Ti50,1Ni50,9 (at %) the diffusion mobility of hydrogen is higher than in coarse-grained samples. This is connected with the increased contribution of grain boundary hydrogen diffusion in samples with nanocrystalline structure.",

author = "Baturin, {A. A.} and Lotkov, {A. I.} and Grishkov, {V. N.} and Rodionov, {I. S.}",

year = "2019",

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doi = "10.1088/1742-6596/1347/1/012125",

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journal = "Journal of Physics: Conference Series",

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note = "15th International Russian-Chinese Symposium on Advanced Materials and Processes ; Conference date: 16-10-2019 Through 19-10-2019",

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TY - JOUR

T1 - Study of hydrogen redistribution in Ti49.1Ni50.9 alloy (at %) with nanocrystalline structure by resistometric and durometer methods

AU - Baturin, A. A.

AU - Lotkov, A. I.

AU - Grishkov, V. N.

AU - Rodionov, I. S.

PY - 2019/12/17

Y1 - 2019/12/17

N2 - The electrolytical hydrogenation of TiNi-based alloys with shape memory and super elasticity results in a significant (by 1,5 times) increase in the microhardness of the surface layer. It is shown that the change of microhardness at long-term aging at room temperature in wire samples of Ti50,1Ni50,9 (at %) alloy with nanocrystalline structure can be used for estimation of diffusion mobility of hydrogen. On wire samples with different diameters it is shown that the increase in the relative electrical resistance at 83K at long-term aging at room temperature for this alloy is also associated with the diffusion mobility of hydrogen. Estimates of the hydrogen diffusion coefficient DH show that in nanocrystalline samples Ti50,1Ni50,9 (at %) the diffusion mobility of hydrogen is higher than in coarse-grained samples. This is connected with the increased contribution of grain boundary hydrogen diffusion in samples with nanocrystalline structure.

AB - The electrolytical hydrogenation of TiNi-based alloys with shape memory and super elasticity results in a significant (by 1,5 times) increase in the microhardness of the surface layer. It is shown that the change of microhardness at long-term aging at room temperature in wire samples of Ti50,1Ni50,9 (at %) alloy with nanocrystalline structure can be used for estimation of diffusion mobility of hydrogen. On wire samples with different diameters it is shown that the increase in the relative electrical resistance at 83K at long-term aging at room temperature for this alloy is also associated with the diffusion mobility of hydrogen. Estimates of the hydrogen diffusion coefficient DH show that in nanocrystalline samples Ti50,1Ni50,9 (at %) the diffusion mobility of hydrogen is higher than in coarse-grained samples. This is connected with the increased contribution of grain boundary hydrogen diffusion in samples with nanocrystalline structure.

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DO - 10.1088/1742-6596/1347/1/012125

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VL - 1347

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

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T2 - 15th International Russian-Chinese Symposium on Advanced Materials and Processes

Y2 - 16 October 2019 through 19 October 2019

ER -

Study of hydrogen redistribution in Ti_49.1Ni_50.9 alloy (at %) with nanocrystalline structure by resistometric and durometer methods

Abstract

ASJC Scopus subject areas

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Fingerprint Dive into the research topics of 'Study of hydrogen redistribution in Ti<sub>49.1</sub>Ni<sub>50.9</sub> alloy (at %) with nanocrystalline structure by resistometric and durometer methods'. Together they form a unique fingerprint.

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