The effect of processing parameters on the dynamic recrystallisation behaviour of API-X70 pipeline steel

Shahrani, Abdullah Al; Yazdipour, Nima; Dehghan-Manshadi, Ali; Gazder, Azdiar A.; Cayron, Cyril; Pereloma, Elena V.

doi:10.1016/j.msea.2013.01.066

Cited by 17 publications

(6 citation statements)

References 45 publications

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“…The activation energy Q of X100 steel is 424.98 kJ/mol which is close to the reported values of low carbon pipeline steels [3,22].…”

Section: Determination Of Constitutive Constants At Different Strainssupporting

confidence: 83%

“…The flow stresses of API X70 steel [3] and API X120 [19] both began to tend towards stability when the strains reached the value of 0.3 at different temperatures and strain rates, so the steady-state stresses were selected as flow stresses to calculate their constitutive equations. Slooff et al [16] found the wrought MgeAleZn alloy often deformed in the non-steady state and they established a strain-dependence constitutive equation to describe its hot deformation behavior.…”

Section: Introductionmentioning

confidence: 99%

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Correction of flow stress and determination of constitutive constants for hot working of API X100 pipeline steel

Qian

Fang

Zhang

et al. 2015

International Journal of Pressure Vessels and Piping

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“…The activation energy Q of X100 steel is 424.98 kJ/mol which is close to the reported values of low carbon pipeline steels [3,22].…”

Section: Determination Of Constitutive Constants At Different Strainssupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Correction of flow stress and determination of constitutive constants for hot working of API X100 pipeline steel

Qian

Fang

Zhang

et al. 2015

International Journal of Pressure Vessels and Piping

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“…Due to the combination of high strength and toughness, high-grade pipeline steels, such as, X70, X80, and X100, has been extensively studied [ 1 , 2 , 3 , 4 , 5 ]. Thermo-mechanical control process (TMCP) is an indispensable and important technology in the manufacture of high-grade pipeline steels, which mainly involves the thermal deformation process of steel plates.…”

Section: Introductionmentioning

confidence: 99%

The Flow Stress–Strain and Dynamic Recrystallization Kinetics Behavior of High-Grade Pipeline Steels

Wang

Yang

et al. 2022

Materials

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The hot deformation behavior of high-grade pipeline steels was studied in the strain rate range of 0.001~0.1 s−1 and the temperature range of 1050~1200 °C by using hot compression tests on a Gleeble 3500 thermomechanical simulator. The flow stress increases with the increase in strain rate and the decrease in deformation temperature, and the deformation activation energy is about 358 kJ/mol. The flows stress–strain behavior of the work-hardening and dynamic recovery (DRV) was calculated using the Estrin–Mecking equation, and the kinetics model of the dynamic recrystallization (DRX) was established based on the Avrami equation through characteristic strains. Furthermore, the flow stress–strain behavior of high-grade pipeline steels was predicted by the established model based on the coupling effects of DRV and DRX. The corresponding predicted results are in good agreement with the experimental results according to standard statistical parameters analysis. Finally, the economic strain (ε3) is proposed by the third derivative of the given kinetic model. Based on these calculation results, when the economic strain (ε3) is reached, uniform and refined DRX grains can be obtained, the energy consumption reduced, and the production costs controlled, which is of great significance to actual factory production.

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“…In order to reduce the transportation costs by long-distance line pipes, higher operating pressures in line pipes are expected, which consequently require higher wall thickness or higher strength steel with excellent combination of high toughness and strength [3][4][5][6][7][8][9]. Therefore, the increasing demand for oil and gas transportation is a driving force for the development of specialized and cost-effective line pipe steels with improved toughness, strength, weldability and corrosion resistance [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…Other rolling parameters and cooling rates were chosen identical in all trials to analyze the effect of hot rolling reduction ratio below TNR. [10][11][12]16].…”

Section: Introductionmentioning

confidence: 99%

Effect of Reduction Ratio below Austenite Recrystallization Stop Temperature on Mechanical Properties of an API X70M PSL2 Line Pipe Steel

Arikan¹,

Tütük

Kayalı

2019

Sakarya University Journal of Science

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Steel grades having high toughness and high strength are required for line pipes since gas and oil should be transported through them at high pressures. Thermo-mechanically controlled rolling processes are used for increasing both toughness and strength at low temperatures since the line pipes are exposed to harsh climatic conditions at full length and rather severe service conditions. Charpy, DWTT and tensile tests were conducted to determine of mechanical properties and measured toughness values were evaluated considering various criteria in this study. Fractured surfaces were examined by means of SEM to distinguish the ductile and brittle fracture areas. Thermo-mechanical rolling trials were performed at the temperature below the non-recrystallization temperature of austenite on an API X70M PSL2 grade steel, to increase the strength without sacrificing the toughness. Different reduction ratios between 60,7% and 72,8% were utilized and the effect of reduction ratios on mechanical properties and microstructures were investigated during the trials. It was observed that final grain size decreased and strength and toughness increased with increasing reduction ratios.

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The effect of processing parameters on the dynamic recrystallisation behaviour of API-X70 pipeline steel

Cited by 17 publications

References 45 publications

Correction of flow stress and determination of constitutive constants for hot working of API X100 pipeline steel

Correction of flow stress and determination of constitutive constants for hot working of API X100 pipeline steel

The Flow Stress–Strain and Dynamic Recrystallization Kinetics Behavior of High-Grade Pipeline Steels

Effect of Reduction Ratio below Austenite Recrystallization Stop Temperature on Mechanical Properties of an API X70M PSL2 Line Pipe Steel

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