Effect of Heat Treatment on Mechanical Properties and Corrosion Behaviour of API X70 Linepipe Steel in Different Environments

Sharma, Lochan; Chhibber, Rahul

doi:10.1007/s12666-018-1465-y

Cited by 9 publications

(5 citation statements)

References 30 publications

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“…The flake carbides are unevenly distributed on the original martensite boundaries, the Charpy absorbed energy is 230, 190, and 128 J for crude oil, seawater, and freshwater, respectively as shown in Figure 4b. The values of impact toughness inferred from the study and that from (Sharma and Chhibber 2019). The impact toughness absorbed energy-reduced notably when the tempering temperature is 600 °C; the coarsened granular carbides appear evidently in the formed microstructure; the key factor of toughness affects the API X60 alloy (Chen and LU 2012).…”

Section: -Impact Hardnessmentioning

confidence: 86%

“…The hardness values decrease by increasing the tempering temperature and by maintaining the austenitizing temperature at 900 °C. The results extracted from the study were compared with that in (Sharma and Chhibber 2019). The hardness values of crude oil as a corrosive medium were maintained at the highest, followed by the values of seawater and finally freshwater without a noticeable behavior change, as shown in Figure 4-a.…”

Section: -Microhardnessmentioning

confidence: 98%

“…For pH value under turbulent flow conditions, the results showed that the corrosion mechanism was mainly controlled by mass transport at pH=4 (Rustandi et al 2013). In addition, different pH values and concentrations of various exposed solutions affect the corrosion behavior of heat-treated samples (Sharma and Chhibber 2019). Hamed et al conducted a comparative study between theoretical chemical parameters and experimental inhibition efficiency of Gemini surfactants for carbon steel API 5L X52 grade (Hamed et al 2019).…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of corrosion resistance and mechanical properties of API 5L X60 steel by heat treatments in different environments

Lieth

Al-Sabur

Jassim

et al. 2021

JER is an international, peer-reviewed journal that publishes f

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Steel pipelines are commonly used in the petroleum industry where high strength and durability values are required. In oil installations, the problems of corrosion, especially with crude oil, appear clearly and dramatically, in dealing with API 5L series. Improving the corrosion protection and mechanical properties are a genius goal for steel manufacturers, the heat treatment processes are familiar with this field. In this study, experimental investigations were executed to find the heat treatment influence on the corrosion rate, microstructure, and mechanical properties behavior of API 5L X60 pipeline steel in the presence of three different environments: seawater, freshwater, and crude oil. Two austenitizing temperatures 900°C and 800°C were prepared followed by quenching at 600°C, 450°C, and 300°C respectively, where the corrosion rate was estimated by the mean weight loss method. In this study, more than 60% of the corrosion rate in both seawater and freshwater was improved at 900 ºC austenitizing tempered at 300ºC for the selected pipeline specimens while only 22% reduction was achieved in crude oil. Different microstructure phases appeared in the heat-treated specimens such as tempered martensitic at 300°C and fine-grained ferrite with polygonal ferrite at 600°C. The microhardness values decreased with increasing the tempering temperatures while impact toughness values increased with tempering temperature increasing from 300°C until it was reached 450°C and then return to decrease again in 600°C.

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Section: -Impact Hardnessmentioning

confidence: 86%

Section: -Microhardnessmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Enhancement of corrosion resistance and mechanical properties of API 5L X60 steel by heat treatments in different environments

Lieth

Al-Sabur

Jassim

et al. 2021

JER is an international, peer-reviewed journal that publishes f

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“…Наявність стану плинності можна встановити порівнюючи величину напружень чи деформацій в елементі конструкцій з їх граничними значеннями [2]. Але величина граничних значень напружень чи деформацій залежить від виду напруженого стану [3][4][5][6][7], швидкості деформування [8,9], температури [10], термообробки [11], історії навантажень елемента конструкції [12] та інших факторів. Цей метод не є надійним, бо врахувати всі ці чинники досить складно.…”

Section: вступunclassified

Monitoring of the plastic state by changing of a deformation sign

Tormakhov

2023

Mech. Adv. Technol.

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When a body element is proportionally loaded, its differently oriented material fibers can stretch, compress or not change their length. The direction of material fibers that do not change their length is neutral. Neutral direction divides compressed and stretched directions of the fibers. Within the limits of elasticity, the neutral direction does not change its orientation, and beyond the limit of elasticity, it rotates relative to the material fibers. Some material fibers, the slope of which is close to neutral, can change their deformation sign, and this change indicates that the element of the body has reached the plastic state.The proposed technique of the plastic state monitoring is demonstrated on a uniaxial stress state. The non-monotonicity of the close to the neutral direction material fiber deformation that oriented is confirmed by calculations and in an experiment on the tension of cylindrical specimen.The proposed technique allows fix plastic state of the material at proportional loading without value deformations or stresses measuring but by changing the sign of the deformation of the material fibers, the slope of which is close to the neutral direction.

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“…As they are durable and versatile, steel is widely used in construction as well [1]. Corrosion can result in heavy financial losses; assessing the corrosion of metal is very important [2]. Corrosion is essentially the deprivation of metal by its reaction to the exposed medium.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the inhibiting action of pectin on corrosion of AISI1040 dual-phase steel with ferrite–martensite and ferrite–bainite structure: a comparison in 0.5 M sulphuric acid

et al. 2021

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The adsorption of pectin and corrosion inhibition of dual-phase AISI1040 steel with ferrite–martensite and ferrite–bainite structure in 0.5 M sulphuric acid (H2SO4) solution have been investigated using the weightloss method. This work investigates the adsorption mechanism and quantum chemical calculations of pectin. For a specific set of parameters such as immersion time and concentration of inhibitor, the maximum inhibition efficiency of 83.36% is observed. The inhibition efficiency increased with pectin concentration and decreased with immersion time at 30 ℃. The results from the statistical analysis show that the concentration of inhibitor is having the highest influence with a 43.87% contribution on the inhibition efficiency. The adsorption study revealed that the Langmuir adsorption isotherm gave the best-fit results out of all the isotherms studied. Theoretical studies based on density functional theory supported experimental observations. From the results, it was also observed that lower weight loss and better inhibition efficiency are achieved in the case of ferrite–bainite when compared to the ferrite–martensite structure. Surface characterization confirmed corrosion and inhibition on the surface of the metal as the surface became uneven when exposed to a corrosive medium and smooth when immersed in the inhibited solution.

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Effect of Heat Treatment on Mechanical Properties and Corrosion Behaviour of API X70 Linepipe Steel in Different Environments

Cited by 9 publications

References 30 publications

Enhancement of corrosion resistance and mechanical properties of API 5L X60 steel by heat treatments in different environments

Enhancement of corrosion resistance and mechanical properties of API 5L X60 steel by heat treatments in different environments

Monitoring of the plastic state by changing of a deformation sign

Analysis of the inhibiting action of pectin on corrosion of AISI1040 dual-phase steel with ferrite–martensite and ferrite–bainite structure: a comparison in 0.5 M sulphuric acid

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