Results 161 to 170 of about 617 (192)

SCC initiation for X65 pipeline steel in the “high” pH carbonate/bicarbonate solution

Corrosion Science, 2003
The initiation of stress corrosion cracking (SCC) was studied using scanning electron microscope observations of linearly increasing stress test specimens. SCC initiation from the following surfaces was studied: (i) initiation from the commercial pipe surface covered by the Zn coating, (ii) initiation from a mechanically polished surface with a ...
Wang, J. Q., Atrens, A.
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The Mechanism of Alternating Current Corrosion of API Grade X65 Pipeline Steel

Corrosion, 2016
In the present work, corrosion rates of API grade X65 pipeline steel in sodium chloride solutions with and without alternating currents (AC) at different direct current (DC) potentials were measured using weight loss analysis. The results show that the effect of AC is most pronounced near the open-circuit potential; at more positive potentials, the ...
Iannuzzi, Mariano, Ghanbari, E., Lillard, R.   +2 more
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CTOA Results for X65 and X100 Pipeline Steels: Influence of Displacement Rate

2008 7th International Pipeline Conference, Volume 3, 2008
The toughness and plasticity of steel generally decreases with increasing testing rate. The crack tip opening angle (CTOA) was measured on two types of commercial pipeline steels API-X65 and API-X100, at a range of displacement rates to characterize rate effects. The testing was conducted at quasi-static and dynamic rates.
R. Reuven, C. McCowan, E. Drexler, A. Shtechman, Ph. Darcis, M. Treinen, R. Smith, J. Merritt, T. Siewert, J. D. McColskey   +9 more
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Hydrogen induced blister cracking and mechanical failure in X65 pipeline steels

International Journal of Hydrogen Energy, 2019
Abstract The present work aims to investigate the role of hydrogen induced blisters cracking on degradation of tensile and fatigue properties of X65 pipeline steel. Both tensile and fatigue specimens were electrochemically charged with hydrogen at 20 mA/cm2 for a period of 4 h. Hydrogen charging resulted in hydrogen induced cracking (HIC) and blister
Vishal Singh, Rajwinder Singh, Kanwer Singh Arora, Dhiraj K. Mahajan   +3 more
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Influence of hydrogen on the tensile properties of X65 D pipeline steel

International Journal of Hydrogen Energy
Natural-gas pipelines converted to carry hydrogen could have reduced mechanical properties due to hydrogen embrittlement. The tensile properties of the X65 D pipeline steel from the Dampier-Bunbury Natural Gas Pipeline were assessed in air and in hydrogen. The microstructure consisted of ferrite and pearlite elongated in the transverse and longitudinal
Joshua Hoschke, Md Fahdul Wahab Chowdhury, Jeffrey Venezuela, Clotario V. Tapia-Bastidas, Maximilian Roethig, Liangyun Lan, Andrej Atrens   +6 more
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Correlation of Microstructure and Toughness of the Welded Joint of Pipeline Steel X65

2009
The integrity and the performance of the welded joint of pipelines depend on the microstructure and associated properties. The welded joint of steel pipes produced by two-pass double sided submerged arc welding (SAW) consisted of the weld metal (WM), heat affected zone (HAZ) and base metal (BM) and as a result the welded joint is characterized by a ...
Rrahim Maksuti, Hamit Mehmeti, Hartmut Baum, Mursel Rama, Nexhat Çerkini   +4 more
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Investigation of Passivation Characteristics of X65 Pipeline Steel in Ethanol Fuel Environments

CORROSION 2011, 2011
Abstract Growing interest in the use of alternative fuels has led to an increase in production of fuel grade ethanol (FGE), necessitating an efficient method of transportation for this biofuel. Occurrences of stress corrosion cracking (SCC) of pipeline steels in FGE have spurred studies toward understanding the phenomenon of this ...
Lindsey Goodman, Preet M. Singh
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Correction factors for safe performance of API X65 pipeline steel

International Journal of Pressure Vessels and Piping, 2009
Prediction of required Charpy energy for fracture arrest is vital for safe performance of gas transportation pipelines. This is commonly estimated through failure models calibrated in the past on fracture data from combined Charpy tests and full-thickness burst experiments. Unfortunately, such pipeline failure models are unable to correctly predict the
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Research on corrosion behaviour of X65 pipeline steel under dynamic AC interference

Corrosion Engineering, Science and Technology, 2020
To accurately assess the corrosion risk under dynamic AC interference, the dynamic fluctuation characteristics of the pipeline near high-speed railway were analyzed by field test data.
Le Chen, Yanxia Du, Yi Liang, Jianjun Li
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Mechanical degradation of API X65 pipeline steel by exposure to hydrogen gas

Metals and Materials International, 2011
Hydrogen-induced degradations have generally been investigated through the ex situ testing of cathodically hydrogen-charged specimens. However, the cathodic charging cannot realize damage accumulation by gaseous hydrogen in transportation pipelines. Thus, we designed an ampule specimen which enables an in situ tensile test containing gaseous hydrogen ...
Yun-Hee Lee, Hae Moo Lee, Yong-il Kim, Seung-Hoon Nahm   +3 more
openaire   +1 more source