Results 191 to 200 of about 25,385 (265)

Fracture Toughness and Application of X80 Pipeline Steel

Materials Science Forum, 2019
The fracture toughness of X80 pipeline steel, which has been widely used in China, plays a key role in pipeline safety insurance. In order to know the accurate fracture toughness of X80, the methods of acoustic emission and high K ratio have been carried out to judge the initiation of crack propagation and improve flatness of fatigue pre-crack front ...
Hua Zhang, Hong Zhang, Cai Hong Lu
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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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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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The experiment study to assess the impact of hydrogen blended natural gas on the tensile properties and damage mechanism of X80 pipeline steel

, 2021
Environmental hydrogen embrittlement has become a non-negligible problem in the hydrogen blended natural gas transportation. To qualitatively study the degradation mechanism of X80 steel used in the natural gas pipelines, the slow strain tensile ...
Dengji Zhou, Taotao Li, Dawen Huang, Yi Wu, Zhongsheng Huang, Wang Xiao, Qin Wang, Xiuyun Wang   +7 more
semanticscholar   +1 more source

Microstructure characteristics and mechanical properties of X80 pipeline steels

Journal of Wuhan University of Technology-Mater. Sci. Ed., 2012
The relation between microstructure characteristics and mechanical properties of X80 pipeline steels was investigated using optical microscopy, scanning electron microscopy, etc. It is shown that the structure consists of polygonal ferrite (PF), quasi-polygonal ferrite (QPF), acicular ferrite (AF), and granular bainitic ferrite (GF).
Min Zhou, Linxiu Du, Yanfeng Zhao, Xianghua Liu   +3 more
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Study on Mechanical Properties Anisotropy of X80 Pipeline Steel

Advanced Materials Research, 2013
The microstructure of X80 pipeline steel in different directions were observed by SEM technique and its effective grain size and misorientation were statistically analyzed by EBSD system. Based on these results, the mechanical properties at 0°, 45° and 90° to the rolling direction of X80 pipeline steel were studied.
Qiang Duan, Jun Yan, Guo Hui Zhu, Qing Wu Cai   +3 more
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Control of Element and Inclusion for X80 Pipeline Steel

Advanced Materials Research, 2013
According to the present situation of production X80 pipeline steel, the performance requirements of X80 pipeline steel, and the effect and control technology of various elements in steel, and the size and shape control technology of inclusions are reviewed.
Qi Chun Peng, Lei Qiu, Jian Zou, Zhi Bo Tong   +3 more
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Prediction of Fatigue Crack Propagation in X80 Pipeline Steel Using Acoustic Emission Sensing

IEEE Sensors Journal
Fatigue cracks in gas pipelines, particularly those constructed from X80 steel, pose significant risks of catastrophic failure if not monitored continuously. This study presents a novel methodology for predicting the fatigue crack propagation rate (FCPR)
Yan Yan, Wei Liu, Yuanhang Gong, Xiaohui Zhang, Ting Shang, Jiaqi Pei, Bin Gao, Xin Li   +7 more
semanticscholar   +1 more source

Electrochemical behaviour of X80 pipeline steel with alumina coating

Surface Engineering, 2015
X80 pipeline steel was firstly aluminised at a relative low temperature then treated by a microarc oxidation process. Electrochemical behaviour of X80 pipeline steel before and after the combined treatment was evaluated by electrochemical tests in different solution. Results show that ceramics coating composed of α-Al2O3 and γ-Al2O3 can be obtained on
M. Huang, M-X. Zhang, Y. Wang, P. Zhang, A-J. Xu   +4 more
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Study on Microstructure and Properties of X80 Pipeline Steel

Advanced Materials Research, 2014
Experimental methods, such as OM, SEM and X-EDS, were used to study the microstructure of X80 pipeline steel. It mainly consists of fine acicular ferrite (AF). X80 pipeline steel possesses high strength and impact energy at-30°C approaches to 400J.
Xiang Dong Huo, Feng Dong, Lie Jun Li
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