Methodology of Analyzing the Causes of Accidental Failure of Pipes Made of Various Steel Grades

Bykova, A. E.; Sharipzyanova, G. Kh.; Volgina, N. I.; Khlamkova, S. S.

doi:10.1134/s0036029518130062

Cited by 10 publications

(9 citation statements)

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“…After the experiment, the corrosion products are removed from the surface with a non-abrasive material, and when studying samples with protective films -with a strong water jet; then the samples are dried without access to air and wiped dry with filter paper. Then the samples are repeatedly weighed [7][8][9][10]. The corrosion rate ρ is calculated in g/m 2 ·h or g/year by the equation [9][10]:…”

Section: Source Datamentioning

confidence: 99%

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Determining the Metal Corrosion Rate by Various Techniques and Comparison of the Results

Artamonova

Горичев

Godunov

2021

DDF

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The paper considers methods for calculating the rate of metals corrosion. A comparative analysis of the experimental data on the steel 10 corrosion rate in carbonate solutions with different pH values (6-12.5) and the concentration of carbonate ions on the disk electrode made of steel 10. The calculation of the corrosion rate by the gravimetric method and the method of polarization resistance is carried out. A detailed description of the calculating the corrosion rate stages index from experimental electrochemical data (I-E) obtained on the potentiostat IPC PRO is given. The advantages and disadvantages of the considered methods are indicated.

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Section: Source Datamentioning

confidence: 99%

“…Then the samples are repeatedly weighed [7][8][9][10]. The corrosion rate ρ is calculated in g/m 2 ·h or g/year by the equation [9][10]:…”

Section: Source Datamentioning

confidence: 99%

Determining the Metal Corrosion Rate by Various Techniques and Comparison of the Results

Artamonova

Горичев

Godunov

2021

DDF

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“…As titanium is a powerful carbide-forming element, it preferentially binds carbon and thereby advantageously reduces the probability of the formation of undesirable (Fe, Cr) 23 C 6 carbides, which negatively affect the material properties in the temperature range of 400-800 • C [23,24]. The formation of Cr 23 C 6 carbides at grain boundaries reduces the amount of dissolved chromium, thereby decreasing the corrosion resistance [25,26]. Titanium does not only react with carbon and nitrogen to produce carbonitrides [27], but also decreases the susceptibility to intergranular stress corrosion cracking by minimizing chromium carbide precipitation along the grain boundaries [28], and effectively suppresses recrystallization during forming [29], all of which enhances the mechanical properties and increases the lifetime of the final products [30,31].…”

Section: Introductionmentioning

confidence: 99%

Determining Hot Deformation Behavior and Rheology Laws of Selected Austenitic Stainless Steels

Němec,

Kunčická,

Opěla

et al. 2023

Metals

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Due to their versatile properties, austenitic stainless steels have a wide application potential, including in specific fields, such as the nuclear power industry. ChN35VT steel is a chromium–nickel–tungsten type of steel stabilized by titanium, and it is suitable for parts subjected to considerable mechanical stress at elevated temperatures. However, the available data on its deformation behavior at elevated/high temperatures is scarce. The core of the presented research was thus the experimental characterization of the deformation behavior of the ChN35VT steel under hot conditions via the determination of flow stress curves, and their correlation with microstructure development. The obtained data was further compared with data acquired for 08Ch18N10T steel, which is also known for its applicability in the nuclear power industry. The experimental results were subsequently used to determine the Hensel-Spittel rheology laws for both the steels. The ChN35VT steel exhibited notably higher flow stress values in comparison with the 08Ch18N10T steel. This difference was more significant the lower the temperature and the higher the strain rate. Considering the peak stress values, the lowest difference was ~8 MPa (1250 °C and 0.01 s−1), and the highest was ~150 MPa (850 °C and 10 s−1). These findings also corresponded to the microstructure developments—the higher the deformation temperature, the more negligible the observed differences as regards the grain size and morphology.

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“…In AISI 321 steels, titanium additives prevent the precipitation of chromium carbides and thereby reduce the tendency to intergranular corrosion [1,19,20]. Titanium additives also affect the behavior of AISI 321 steel during hot deformation.…”

Section: Introductionmentioning

confidence: 99%

Study on the Hot Deformation Behavior of Stainless Steel AISI 321

et al. 2022

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In this study, the hot deformation behavior of austenitic Ti-modified AISI 321 steel with a relatively high content of carbon (0.07 wt.%) and titanium (0.50 wt.%) was studied in the temperature range of 1000–1280 °C and strain rates in the range of 0.01–1 s−1. Hot deformation was carried out with uniaxial compression of cylindrical specimens on a Gleeble 3800 thermomechanical simulator. It is shown that the flow stress increased with a decrease in the deformation temperature and an increase in the strain rate. The shape of the stress-strain curves indicates that, at high temperatures and low strain rates, the hot deformation of AISI 321 steel was accompanied by dynamic recrystallization. The passage of dynamic recrystallization was confirmed by microstructural studies. Hyperbolic sine type of constitutive equation with deformation activation energy Q = 444.2 kJ·mol−1 was established by analyzing the experimental flow stresses. The power-law dependences of the critical strain necessary for the onset of dynamic recrystallization and the size of recrystallized grains on the Zener–Hollomon parameter were established. The value of the parameter Z = 5.6 × 1015 was determined, above which the dynamic recrystallization was abruptly suppressed in the steel under study. It is speculated that the suppression of dynamic recrystallization occurs due to dispersed precipitates of titanium carbonitrides.

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Methodology of Analyzing the Causes of Accidental Failure of Pipes Made of Various Steel Grades

Cited by 10 publications

References 0 publications

Determining the Metal Corrosion Rate by Various Techniques and Comparison of the Results

Determining the Metal Corrosion Rate by Various Techniques and Comparison of the Results

Determining Hot Deformation Behavior and Rheology Laws of Selected Austenitic Stainless Steels

Study on the Hot Deformation Behavior of Stainless Steel AISI 321

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