Effect of cooling temperature on the microstructure and corrosion behavior of X80 pipeline steel

Ma, Jing; Feng, Fan; Yu, Bai-qing; Chen, Haifeng; Fan, Lifeng

doi:10.1007/s12613-019-1882-x

Cited by 15 publications

(11 citation statements)

References 5 publications

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“…Previous research shows that the finishing rolling temperature and beginning quick cooling temperature, i.e., relaxation time, are very important in determining the volume fractions of ferrite and bainite [ 12 , 13 ]. The C content in undercooled austenite increases as the ferrite transformation and amount increases; simultaneously, the subsequent rapid cooling rate affects the microstructure and mechanical properties of the bainite [ 19 ]. As a result, the bainite change in strength and plasticity causes the variation in the strength and plasticity of the F/B dual-phase pipeline steels.…”

Section: Introductionmentioning

confidence: 99%

Effect of Bainite to Ferrite Yield Strength Ratio on the Deformability of Mesostructures for Ferrite/Bainite Dual-Phase Steels

et al. 2021

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The strength and plasticity balance of F/B dual-phase X80 pipeline steels strongly depends on deformation compatibility between the soft phase of ferrite and the hard phase of bainite; thus, the tensile strength of ferrite and bainite, as non-negligible factors affecting the deformation compatibility, should be considered first. In this purely theoretical paper, an abstract representative volume elements (RVE) model was developed, based on the mesostructure of an F/B dual-phase X80 pipeline steel. The effect of the yield strength difference between bainite and ferrite on tensile properties and the strain hardening behaviors of the mesostructure was studied. The results show that deformation first occurs in ferrite, and strain and stress localize in ferrite prior to bainite. In the modified Crussard-Jaoul (C-J) analysis, as the yield strength ratio of bainite to ferrite (σy,B/σy,F) increases, the transition strain associated with the deformation transformation from ferrite soft phase deformation to uniform deformation of ferrite and bainite increases. Meanwhile, as the uncoordinated deformation of ferrite and bainite is enhanced, the strain localization factor (SLF) increases, especially the local strain concentration. Consequently, the yield, tensile strength, and yield ratio (yield strength/tensile strength) increase with the increase in σy,B/σy,F. Inversely, the strain hardening exponent and uniform elongation decrease.

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Section: Introductionmentioning

confidence: 99%

Effect of Bainite to Ferrite Yield Strength Ratio on the Deformability of Mesostructures for Ferrite/Bainite Dual-Phase Steels

et al. 2021

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“…Controlling the cooling process during their production can optimize the microstructure and mechanical properties of steel plates. [1] The traditional quenching method involves transferring a high-temperature ultrathick plate from the furnace to the water tank and accelerating the heat exchange by stirring the coolant. However, the uneven and gentle convection conditions result in low cooling capacity and poor uniformity.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Mechanism for Roller Quenching with an Ultrathick Plate

Tian

Wang

et al. 2021

steel research int.

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The complexity of roller quenching equipment restricts research on the heat transfer mechanism of ultrathick plates, and the cooling law requires further clarification. In this study, the distributions of temperature gradient, average cooling speed, and heat loss during quenching are analyzed using a 220 mm thick steel plate, and inverse heat conduction is used to determine the surface heat transfer conditions. An ultrathick steel plate is subjected to high‐pressure and low‐pressure water in turn for strong and lasting cooling. Due to the different flow regions on the upper and lower surfaces, the flow from the lower nozzle is slightly higher than that from the upper nozzle, thereby resulting in a good cooling symmetry between the upper and lower surfaces. The results provide an important basis for the optimization of roller quenching technology for ultrathick steel plates.

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“…That has driven the specialists to investigate their appropriateness for various structural and constructional purposes (Katiyar et al 2019). Though plenty of research articles were published concerning a generally excellent blend of mechanical properties in DP steels (Karimi et al 2017;Basantia et al 2021;Bilal et al 2019;Fereiduni and Ghasemi Banadkouki 2014;Kumar et al 2019;Shahzad et al 2018;Xiong et al 2019;Zhao et al 2019;Zhu 2019), further examinations are important to discover the impact of phase constituents on the corrosion resistance properties (Bignozzi et al 2020;Gürkan Aydın 2019;Ma et al 2020;Prabhu et al 2020a, b;Zhang et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Chemical, electrochemical, thermodynamic and adsorption study of EN8 dual-phase steel with ferrite-martensite structure in 0.5 M H2SO4 using pectin as inhibitor

et al. 2021

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This paper presents the corrosion and inhibition behavior of heat-treated EN8 dual-phase steel with ferrite-martensite structure with pectin in 0.5 M sulphuric acid. The corrosion studies were performed using the weight loss method, electrochemical techniques such as potentiodynamic polarization measurements, and impedance spectroscopy. The study was done at different concentrations of pectin in the temperature range of 40 to 70 °C and immersion time of 1, 3, 5, and 7 h. The results showed that the inhibition performance of pectin has enhanced with an increase in pectin concentration and decreased with the temperature and time of exposure. From the weight loss study, highest inhibition efficiency of 76.43% was achieved at 5.0 g/L at 1 h of exposure at 40 °C. The maximum inhibition efficiency of 62% was obtained with 5.0 g/L of pectin at 40 °C by potentiodynamic polarization method. The energy, enthalpy, and entropy of activation and also thermodynamic parameters like free energy, enthalpy, and entropy of adsorption were assessed and discussed. Appropriate adsorption isotherm was fit to the obtained experimental outcomes and achieved Langmuir adsorption isotherm to be the best fit and obeyed physical adsorption. Surface analysis: scanning electron microscopy, X-ray diffraction techniques, atomic force microscopy, and energy dispersive X-ray were done with and without the addition of pectin. The metal surface appears to be uniform and smooth in the presence of pectin and adsorption was confirmed by surface analysis.

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Effect of cooling temperature on the microstructure and corrosion behavior of X80 pipeline steel

Cited by 15 publications

References 5 publications

Effect of Bainite to Ferrite Yield Strength Ratio on the Deformability of Mesostructures for Ferrite/Bainite Dual-Phase Steels

Effect of Bainite to Ferrite Yield Strength Ratio on the Deformability of Mesostructures for Ferrite/Bainite Dual-Phase Steels

Heat Transfer Mechanism for Roller Quenching with an Ultrathick Plate

Chemical, electrochemical, thermodynamic and adsorption study of EN8 dual-phase steel with ferrite-martensite structure in 0.5 M H2SO4 using pectin as inhibitor

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