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

A. A. Baturin, A. I. Lotkov, V. N. Grishkov, I. S. Rodionov

Результат исследований: Материалы для журнала

Аннотация

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.

Язык оригиналаАнглийский
Номер статьи012125
ЖурналJournal of Physics: Conference Series
Том1347
Номер выпуска1
DOI
СостояниеОпубликовано - 17 дек 2019
Событие15th International Russian-Chinese Symposium on Advanced Materials and Processes - Sochi, Российская Федерация
Продолжительность: 16 окт 201919 окт 2019

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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