Directional diffusion of hydrogen and the hydrogen brittleness of titanium alloys

Kolachev, B. A.; Nazimov, O. P.

doi:10.1007/bf00728793

Cited by 4 publications

(3 citation statements)

References 1 publication

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“…It can be seen that the coefficient D H and hydrogen velocity yielded in the vacuum chamber at a stationary level for NC-titanium are lower than appropriate values for MC-titanium. It should be stated that the coefficient D H for MC-titanium derived in the experiment well matches with the data introduced in paper [12], in which the coefficient D H for technically plain titanium was determined with the study of hydrogen distribution depth in the sample after its partial saturation with hydrogen or partial degassing (Table 1). After determination of diffusion coefficient through a membrane, the mass concentration of hydrogen was measured in these samples.…”

Section: Resultssupporting

confidence: 78%

The Study of Hydrogen Accumulation Dynamics in Ti-6Al-4V Nanocrystalline Alloy

Pimenov

Nikitenkov

Сыпченко

et al. 2015

AMR

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This work presents the results of hydrogen diffusion study in macro-and nanocrystalline titanium using the method of combining an electrolytic cell with vacuum chamber through the membrane. It has been stated that the formation of nanocrystalline structure, on the one hand, leads to the decrease in the effective hydrogen diffusion coefficient and, on the other hand, to the increase in the capability to accumulate hydrogen. This is observed due to more developed grain boundaries in nanocrystalline samples as compared with macrocrystalline.

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Section: Resultssupporting

confidence: 78%

The Study of Hydrogen Accumulation Dynamics in Ti-6Al-4V Nanocrystalline Alloy

Pimenov

Nikitenkov

Сыпченко

et al. 2015

AMR

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“…In accordance with [1][2][3][4][5], under certain conditions, e.g., high temperatures and pressures, electrolytic reactions, and the plastic deformation of metal, a significant amount of hydrogen can dissolve in metallic materials, subjecting them to "hydrogenation", accompanied by a change in structure and mechanical properties of the metal [6], which in some cases may be the cause of the destruction of the metal structure [7,8]. Thus, according to the authors of [9,10], hydrogenation of the pipe material in an area with destroyed insulation, which occurs due to the presence of atomic hydrogen as a product of ground water electrolysis, on the metal surface, is exactly the cause of breakage of underground main gas pipelines due to stress corrosion damage.…”

Section: Introductionsupporting

confidence: 75%

Using the Magnetic Anisotropy Method to Determine Hydrogenated Sections of a Steel Pipeline

Bolobov

Latipov

Zhukov³

et al. 2023

Energies

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The paper deals with a non-destructive method of detecting hydrogenated sections of pipelines, which is based on variations of the level of mechanical stresses generated in the surface layers of the steel pipe material during its hydrogenation. The use of a magnetoanisotropic method based on the phenomenon of metal magnetoelastic anisotropy development, which consists in the variation of the magnetic properties of ferromagnetic materials in direction and magnitude under the influence of mechanical stresses, is proposed as a way to register that variation. Based on the results of tensile testing of carbon steel plates with measurement of the difference in principal mechanical stresses (DPMS) occurring in metal, as well as experiments on electrolytic hydrogenation of specimens with measurement of the DPMS signal, it was confirmed that when steel structures are saturated with hydrogen, tensile stresses are generated in the surface layers, the magnitude of which increases as the concentration of hydrogen increases in the metal. In this case, it is assumed that the indicated dependence between the hydrogen concentration in the metal and the stresses arising as a result of hydrogenation is linear. For the example of lamellar specimens made of pipe low-carbon steel, the possibility of using the magnetoanisotropic method for registering sections of underground pipelines with a high content of hydrogen is substantiated, which can become the basis for a method of diagnosing sections of pipelines with broken insulation for the possibility of their further operation. The scientific novelty of this article is the establishment of a relationship between the hydrogen content in the metal, the stresses that arise in this case, and the change in the magnetic properties of ferromagnetic materials, characterized by the magnitude of the DPMS signal. This study contributes to the understanding of the process of hydrogenation of metals, and may be useful in detecting and preventing damage to gas and oil pipelines caused by hydrogen embrittlement as a cause of stress corrosion.

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“…Typically, almost all these twins contain dislocations inside themselves. Twinning in α titanium during plastic deformation can occur along six planes [16]. The predominant type of twinning depends on both the loading scheme and the temperature of deformation.…”

Section: Resultsmentioning

confidence: 99%

Shock-Wave Properties and Deformation-Induced Structure of Commercial-Purity Titanium

Pavlenko

Добромыслов

Талуц

et al. 2021

Phys. Metals Metallogr.

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The shock compressive wave profiles of commercial-purity titanium samples under different loading conditions have been measured. The spall strength of titanium as a function of the strain rate and temperature of deformation has been found. High-rate plastic deformation mechanisms have been studied. High-rate plastic deformation under the investigated loading conditions has been shown to occur by slip and twinning. The α → ω transformation has been established to begin at 12.2 GPa.

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Directional diffusion of hydrogen and the hydrogen brittleness of titanium alloys

Cited by 4 publications

References 1 publication

The Study of Hydrogen Accumulation Dynamics in Ti-6Al-4V Nanocrystalline Alloy

The Study of Hydrogen Accumulation Dynamics in Ti-6Al-4V Nanocrystalline Alloy

Using the Magnetic Anisotropy Method to Determine Hydrogenated Sections of a Steel Pipeline

Shock-Wave Properties and Deformation-Induced Structure of Commercial-Purity Titanium

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