Results 171 to 180 of about 800,014 (209)

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +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
openaire   +1 more source

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
openaire   +1 more source

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

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
openaire   +1 more source

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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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
openaire   +1 more source

Micromechanical modelling of API X80 linepipe steel

International Journal of Pressure Vessels and Piping, 2022
Aditya Kumar, null Naveen, Kanwer Singh Arora, Harpreet Singh, Rahul Chhibber   +4 more
openaire   +1 more source