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Fracture Toughness and Application of X80 Pipeline Steel
Materials Science Forum, 2019The 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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Control of Element and Inclusion for X80 Pipeline Steel
Advanced Materials Research, 2013According 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 +3 more
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Hydrogen induced cracking of X80 pipeline steel
International Journal of Minerals, Metallurgy, and Materials, 2010The hydrogen-induced cracking (HIC) behavior of X80 pipeline steel was studied by means of electrochemical charging, hydrogen permeation tests, tension test, and scanning electron microscopy (SEM). The experimental results indicate that the increase of charging time and charging current density or the decrease of the solution pH value leads to an ...
Chao-fang Dong +4 more
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Study on Microstructure and Properties of X80 Pipeline Steel
Advanced Materials Research, 2014Experimental 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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Structure and Properties of X80 and X100 Pipeline Girth Welds
2004 International Pipeline Conference, Volumes 1, 2, and 3, 2004This study aims to provide an understanding of the factors that control weld metal strength and toughness of mechanized field girth welds produced in X80 and X100 line pipe steels using a range of pipeline gas metal arc welding procedures. In the investigation of X80 welds, a series of experimental single and dual torch gas metal arc welds were ...
J. A. Gianetto +3 more
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Welding And Construction Requirements For X80 Offshore Pipelines
Offshore Technology Conference, 1993ABSTRACT The trend for increased demand of natural gas has prompted the development of huge gas fields, which will require large diameter pipelines at higher operating pressures. The ability to decrease wall thicknesses through the use of higher yield strength pipe can dramatically effect fabrication costs and make ...
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Precipitation behaviors of X80 acicular ferrite pipeline steel
International Journal of Minerals, Metallurgy, and Materials, 2011The precipitation behaviors of X80 acicular ferrite pipeline steel were investigated by using transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS). The results show that dendritic precipitates in the as-cast steel slabs precipitate mainly in grain boundaries, and these dendritic precipitates dissolve and re-precipitate to two
Ai-min Zhao +5 more
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Effect of Pseudomonas sp. on simulated tidal corrosion of X80 pipeline steel
Bioelectrochemistry, 2023Microbiologically influenced corrosion of pipeline steel in seawater has long been concerned by scholars all over the world, but there were few reports on the microorganism effect on marine tidal corrosion of steels. In this work, the effect of Pseudomonas sp. on static tidal corrosion of X80 pipeline steel were systematically studied using weight-loss,
Xiaobao, Zhou +5 more
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Study on Mechanical Properties Anisotropy of X80 Pipeline Steel
Advanced Materials Research, 2013The 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 +3 more
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Effect of Inclusion on Pitting Corrosion of X80 Pipeline Steel
Advanced Materials Research, 2015The 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 +5 more
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