Results 171 to 180 of about 667,854 (213)

Splitting susceptibility in modern X80 pipeline steels

Materials Science and Engineering: A, 2020
Abstract The microstructure and crystallographic texture of modern industrially produced API X80 grade pipeline steels were studied to identify the factors associated with the phenomenon known as splitting, which can occur on the fracture surfaces of Charpy, drop-weight tear test and full-scale fracture propagation tests.
Gervasyev, Alexey, Pyshmintsev, Igor, Petrov, Roumen, Huo, Chunyong, Barbaro, Frank J   +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
openaire   +1 more source

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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Effects of strain on the corrosion behaviour of X80 steel

Corrosion Science, 2011
Abstract The effects of strain on the corrosion behaviour of X80 steel in 0.62 M NaCl aqueous solution were investigated in the present paper. An increase in strain causes the corrosion resistance of the specimen to present a down and up trend, with the lowest point at about 1.0 × 10−3.
Yongxing Wang, Weimin Zhao, Hua Ai, Xiaoguang Zhou, Timing Zhang   +4 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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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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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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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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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
openaire   +1 more source