Results 171 to 180 of about 1,410 (212)

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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Hydrogen induced cracking of X80 pipeline steel

International Journal of Minerals, Metallurgy, and Materials, 2010
The 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, Kui Xiao, Zhi-yong Liu, Wen-jing Yang, Xiao-gang Li   +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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Precipitation behaviors of X80 acicular ferrite pipeline steel

International Journal of Minerals, Metallurgy, and Materials, 2011
The 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, Yan Wang, Yin-li Chen, Di Tang, Xu-tao Gao, Bi-qiang Zuo   +5 more
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Formation of Martensite/Austenite (M/A) in X80 Linepipe Steel

Volume 3: Materials and Joining, 2012
Linepipe steels are usually microalloyed with Nb to promote the formation of complex microstructures that lead to the required mechanical properties. In particular, Nb in solution affects significantly the austenite decomposition kinetics and the resulting microstructure.
Jennifer M. Reichert, Thomas Garcin, Matthias Militzer, Warren J. Poole   +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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The Effect of Microstructure on Tensile Behaviour of X80 Microalloyed Steel

Volume 3: Materials and Joining, 2012
A high degree of work hardening is desirable for steels to be employed in strain-based pipeline designs. In an effort to enhance work hardening characteristics, this study was conducted to determine the effect of thermal treatment on microstructural development and the subsequent relationship between microstructure and tensile behaviour of high ...
Katherine Jonsson, Douglas G. Ivey, Hani Henein, Shahrooz Nafisi, Laurie Collins, Thomas Garcin, Warren Poole   +6 more
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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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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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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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