Search Results - "Nykyforchyn, H."

Methods for the Evaluation of Corrosion-Hydrogen Degradation of Steels of Oil-and-Gas Pipelines by Zvirko, О. І., Кryzhanivskyi, E. І., Nykyforchyn, H. М., Krechkovska, H. V.

“…We analyze the mechanical, structural-fractographic, and electrochemical methods aimed at the evaluation of the in-service degradation of pipe steels with…”
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Micromechanism of Propagation of Fatigue Cracks in Pseudoelastic NiTi Shape-Memory Alloy by Yasnii, V. P., Student, O. Z., Yasnii, P. V., Nykyforchyn, H. М.

“…We analyze the kinetic features and micromechanism of propagation of fatigue cracks in pseudoelastic nitinol alloy with shape-memory effect under the…”
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Effective method for fatigue crack arrest in structural steels based on artificial creation of crack closure effect by Khaburskyi, Ya, Slobodyan, Z., Hredil, M., Nykyforchyn, H.

“…•Effective method for fatigue crack arrest in a whole actual SIF range is proposed.•Method consists in metal treatment with special technological environment…”
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Influence of Hydrogenation on the Character of Fracture of Nitinol Alloy in Tension by Iasnii, V. P., Student, O. Z., Nykyforchyn, H. М.

“…We establish the macro- and microfractographic features of the tensile fracture of cylindrical specimens made of nitinol (Ni–Ti alloy) at room temperature and…”
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Role of Nonmetallic Inclusions in Premature Stress-Corrosion Fractures of Drill Pipes by Kryzhanivskyi, E. І., Nykyforchyn, H. М., Student, О. Z., Krechkovska, H. V., Chudyk, І. І.

“…We analyze the causes of the in-service loss of integrity of drill pipes made of G105 steel connected with their premature stress-corrosion fractures. In this…”
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Fractographic Criterion of Attainment of the Critical Technical State by Carbon Steels by Student, О. Z., Krechkovs’ka, H. V., Nykyforchyn, H. М., Kurnat, І. М.

“…We propose a microfractographic method for the evaluation of the technical state of rolled carbon steels after long-term operation based on the construction of…”
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Mechanism of Development of Damage of Low-Strength Pipe Steel Due to Hydrogenation Under Operation by Zvirko, O. I., Hredil, M. I., Tsyrulnyk, O. T., Student, O. Z., Nykyforchyn, H. M.

“…Resistance of pipe steels to hydrogen embrittlement is an important indicator of their serviceability. Pipes are manufactured from steels of a wide strength…”
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Development of the Laboratory Method of Degradation of Steels for the Evaluation of their Resistance to Corrosion Cracking by Hredil, M. I., Zvirko, O. I., Tsyrulnyk, O. T., Nykyforchyn, H. M.

“…We propose an adaptation of the laboratory express method of degradation of low-alloy steels that combines preliminary electrolytic hydrogenation with…”
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Structural and Corrosion Fracture Mechanics as Components of the Physicochemical Mechanics of Materials by Nazarchuk, Z. Т., Nykyforchyn, H. M.

“…On the occasion of the centenary of the Ukrainian National Academy of Sciences and 90th birthday of O. M. Romaniv, prominent Ukrainian scientist and active…”
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In-Service Degradation of Structural Steels under Cyclic Loading by Zvirko, O. I., Nykyforchyn, H. M., Tsyrulnyk, O. T., Voloshyn, V. A., Venhrynyuk, O. I.

“…We analyze the characteristics of in-service degradation of structural steels under the conditions of cyclic loading and take into account that the process of…”
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Evaluation of the Residual Life of a Pipe of Oil Pipeline with an External Surface Stress-Corrosion Crack for a Laminar Flow of Oil with Repeated Hydraulic Shocks by Andreikiv, О. E., Nykyforchyn, H. М., Shtoiko, І. P., Lysyk, A. R.

“…We propose a computational model for the evaluation of the residual service life of a pipe of the oil pipeline weakened by an external surface stress-corrosion…”
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Fractographic Signs of the In-Service Degradation of Welded Joints of Oil Mains by Krechkovs’ka, H. V., Yanovs’kyi, S. R., Student, O. Z., Nykyforchyn, H. М.

“…According to the results of inspection of the damaged elements of an oil pipeline with axial welded joints, we analyze the most probable sites of fracture…”
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Diagnostics of the Engineering State of Steam Pipelines of Thermal Power Plants by the Hardness and Crack Resistance of Steel by Krechkovs’ka, H. V., Student, O. Z., Nykyforchyn, H. M.

“…We propose a nondestructive method for the diagnostics of the current state of heat-resistant steels after long-term operation in the steam pipelines of…”
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Method of Assessing the Influence of Gaseous Hydrogen on Corrosion and Hydrogenation of Steels by Zvirko, O. I., Hredil, M. I., Tsyrulnyk, O. T., Venhryniuk, O. I., Nykyforchyn, H. M.

“…A laboratory method has been developed to investigate the gaseous hydrogen effect on the intensity of electrochemical processes on pipe steels under the action…”
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Fractographic Features of the Fatigue Fracture of Nitinol Alloy by Iasnii, V. P., Nykyforchyn, H. M., Student, O. Z., Svirska, L. M.

“…We study the macro- and microfractographic features of the mechanism of initiation and propagation of fatigue cracks in the nitinol alloy after its testing for…”
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Corrosion Degradation of Steel of an Elbow of Gas Pipeline with Large-Scale Delamination after Long-Term Operation by Zvirko, O. I., Mytsyk, A. B., Tsyrulnyk, O. T., Gabetta, G., Nykyforchyn, H. M.

“…The electrochemical corrosion behavior of the low-carbon steel of an elbow of gas pipeline after long term operation with extensive hydrogen-induced…”
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Influence of process parameters on the corrosion properties of electrolytic conversion plasma coated magnesium alloys by Blawert, C., Heitmann, V., Dietzel, W., Nykyforchyn, H.M., Klapkiv, M.D.

“…The synthesis of oxides in a low-temperature electrolytic plasma allows to cover surfaces of magnesium and its alloys with multifunctional protective…”
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Specific Features of Deformation of the Nitinol Alloy After Electrolytic Hydrogenation by Iasnii, V. P., Nykyforchyn, H. M., Tsyrul’nyk, O. T., Student, O. Z.

“…Specific features of the effect of hydrogenation on the susceptibility of a Ni–Ti alloy with shape memory to deformation are determined with the use of…”
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Brittle-Fracture Resistance of the Metal of Hyperboloid Gridshell Shukhov Tower by Krechkovs’ka, H. V., Student, О. Z., Kutnyi, А. І., Nykyforchyn, H. М., Sydor, P. Ya

“…We determine the impact toughness and study the fractographic characteristics of the fracture surfaces of the old and repair steels (produced in 1906 and 1944,…”
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Influence of electrolyte on corrosion properties of plasma electrolytic conversion coated magnesium alloys by Blawert, C., Heitmann, V., Dietzel, W., Nykyforchyn, H.M., Klapkiv, M.D.

“…The synthesis of oxides in a low-temperature electrolytic plasma allows to cover surfaces of magnesium and its alloys with multifunctional protective…”
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