Results 141 to 150 of about 468 (174)

Effect of Inclusion on Pitting Corrosion of X80 Pipeline Steel

Advanced Materials Research, 2015
The influence of inclusion on pitting corrosion of X80 pipeline steel was investigated by using electrochemical test and atomic force microscope. The results indicated that corrosion potential of X80 pipeline steel sample with higher grade inclusion was lower, and decreased significantly with chloride ion concentration increasing.
Feng Jun Lang, Xian Qiu Huang, Tao Pang, Ying Ma, Peng Cheng, Rui He   +5 more
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Texture Dependent Mechanical Anisotropy of X80 Pipeline Steel

Advanced Engineering Materials, 2010
AbstractPipeline steel grades API X80 are used for oil and gas transport. The most important mechanical properties of these steel grades are strength and fracture toughness. A remarkable directional anisotropy of toughness and strength were often observed in the plates.
N. Sanchez Mouriño, R. Petrov, J.‐ho Bae, K. Kim, L. A. I. Kestens   +4 more
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Passivation process of X80 pipeline steel in bicarbonate solutions

International Journal of Minerals, Metallurgy, and Materials, 2011
The passivation process of X80 pipeline steel in bicarbonate solutions was investigated using potentiodynamic, dynamic electrochemical impedance spectroscopy (DEIS), and Mott-Schottky measurements. The results show that the shape of polarization curves changes with HCO 3 − concentration. The critical
Jian-long Zhou, Xiao-gang Li, Cui-wei Du, Ying Pan, Tao Li, Qian Liu   +5 more
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SH-CCT of High-Strain Pipeline Steel X80

Advanced Materials Research, 2012
Simulated heat affected zone continuous cooling transformation curve was measured by means of Gleeble 3500 thermal simulator. According to the results of microstructure observation and hardness measurement, influence of cooling rates on the microstructure and hardness in coarse grain zone of high-strain pipeline steel X80 was studied.
Mei Juan Hu, Peng Wang, Wei Ping Lin, Xiao Yan Wang, Ling Kang Ji   +4 more
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Constitutive relationship of hot deformation of X80 pipeline steel

2010 International Conference on Mechanic Automation and Control Engineering, 2010
In order to realize numerical simulation of hot rolling and establish the hot deformation process parameters for X80 pipeline steel, the flow stress behavior of X80 pipeline steel during hot deformation was investigated in the temperature range of 900–1100°C and strain rate of 0.01–1s−1 on Gleeble-3500 thermo-simulation machine.
null Ma Bo, null Peng Yan, null Liu Yun-fei, null Jia Bin   +3 more
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THE SOFTENING BEHAVIOR OF HIGHER NIOUBIUM CONTENT X80 PIPELINE STEEL

International Journal of Modern Physics B, 2009
In this paper, the softening behavior of higher Nb content X80 pipeline steel was investigated by means of the stress relaxation curve. Deformed above 1050°C, the softening of the steel is fast and controlled by static recrystallization. Although the softening at 1000°C is slower obviously, it was also controlled by static recrystallization, no more ...
CHENGLIANG MIAO, CHENGJIA SHANG
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Development mechanism of internal local corrosion of X80 pipeline steel

Journal of Materials Science & Technology, 2020
Abstract The occurrence and development mechanism of internal local corrosion has always been a controversial topic, and especially under flow conditions. In this paper, an improved high shear force loop was experimentally used, and local flow field is induced by simulating corrosion defects on the surface of X80 pipeline steel specimens.
Zhuowei Tan, Liuyang Yang, Dalei Zhang, Zhenbo Wang, Frank Cheng, Mingyang Zhang, Youhai Jin   +6 more
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Effect of Microstructures on Corrosion of X80 Pipeline Steel in an Alkaline Soil

Advanced Materials Research, 2012
The influence of microstructures with different heat treatments to stimulate the weld fusion zone and HAZ on corrosion properties of X80 pipeline steel was investigated in alkaline sand soil using electrochemical measurement and surface analysis(SEM, EDS and XRD).
Cong Min Xu, Rong Biao Li, Ji Long Wang, Gang Gang Zhang   +3 more
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Study on AC Corrosion on Cathodically Protected Pipeline of X80 Steel

CORROSION 2014, 2014
Abstract Alternating current (AC) induced-corrosion on cathodically protected pipeline of X80 steel was studied by electrochemical impedance spectra (EIS). Experiments show that: EIS curves contain two time constants which represent high-frequency capacitance arc and low-frequency inductive loop, respectively.
Peng Zhang, Jinfu Ma, Zhenjun Liu, Chunyan Ye   +3 more
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Influence of hydrogen pressure on fatigue properties of X80 pipeline steel

International Journal of Hydrogen Energy, 2017
Abstract The low-cycle fatigue and fatigue crack growth (FCG) properties of X80 pipeline steel in hydrogen atmosphere were determined to investigate the variation of hydrogen pressure and its influence on fatigue life. The test environment was switched to a hydrogen atmosphere after 1000, 3000, or 5000 cycles of pre-fatigue testing in a nitrogen ...
Teng An, Huangtao Peng, Pengpeng Bai, Shuqi Zheng, Xiangli Wen, Lin Zhang   +5 more
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