Results 21 to 30 of about 25,385 (265)

Precipitates in Nb and Nb–V Microalloyed X80 Pipeline Steel [PDF]

Microscopy and Microanalysis, 2013
AbstractPrecipitates in two X80 pipeline steels were studied by transmission electron microscopy equipped with an energy filtering system. The steels are microalloyed with niobium and niobium–vanadium (Nb–V), respectively, and produced by continuous hot rolling.
Zhongyi, Li, Delu, Liu, Jianping, Zhang, Wenhuai, Tian   +3 more
openaire   +2 more sources

Measurements by SKPFM and Finite‐Element Modeling of Hydrogen Atom Diffusion and Distribution in Ferrite and Bainite Contained in X80 Steel

steel research international, Volume 94, Issue 6, June 2023., 2023
Herein, a new method is developed by combining scanning Kelvin probe force microscopy measurements with finite‐element modeling, studying the hydrogen atom diffusion and distribution in ferrite and bainite phases contained in X80 pipeline steel. The hydrogen atom concentrations in lattice and trap sites in the two phases are determined.
Qing Hu, Yufeng Frank Cheng
wiley   +1 more source

Strain model and experimental study of elastic viscoplastic for crack-tip zone of X80 steel pipe

Journal of Pipeline Science and Engineering, 2022
The mechanical state of the process zone at the crack-tip is one of the main factors that affect crack initiation and growth in the long-term safe operation of oil and gas pipelines. Many tests showed that the stress and strain fields in the fracture-tip
Shaohua Dong, Feng Li, Donghua Peng, Hang Zhang, Shiwen Guo, Haotian Wei, Xuan Sun, Yasir Mukhtar   +7 more
doaj   +1 more source

A new analytical method for calculating the strain of oil and gas pipeline under a normal fault dislocation

Energy Science &Engineering, Volume 11, Issue 1, Page 398-409, January 2023., 2023
A new analytic method for the buried pipeline crossing the normal fault based on the shape function. Abstract Oil and gas pipelines that go through an active normal fault often deform largely and cause serious disasters. On the basis of the beam theory of the elastic foundation and assuming a shape function for the deformed pipeline, a new analytical ...
Wen‐jun Hu, Yu Zhao, Kai‐heng Hu, Gui‐yu Chen, Kai‐wei Fu   +4 more
wiley   +1 more source

Progress and prospects of research and application of X80 pipeline steel and steel pipe in China

You-qi chuyun, 2020
With the rapid development of oil and gas pipeline construction, X80 pipeline steel and steel pipe have been applied on large scale. The research and application history and main progress of X80 high-grade pipeline steel and steel pipe in China were ...
Yaorong FENG, Lingkang JI, Weiwei LI, Yinglai LIU, Chunyong HUO   +4 more
doaj   +1 more source

A comprehensive study on the microstructure and mechanical properties of arc girth welded joints of spiral welded high strength API X70 steel pipe [PDF]

, 2020
In the paper, the effect of welding technology on the microstructure and mechanical properties of girth welded joints was presented. Metallographic examinations based on light microscopy and SEM were conducted on girth welded joints of API X70 steel pipe.
De Waele, Wim, Dymek, S., Hertelé, Stijn, Kopyściański, M., Niagaj, J., Rykała, J., Węglowski, M. St.   +6 more
core   +1 more source

Research on Material Selection Method and Brittle Fracture Mechanism of High‐Pressure Pipeline

Shock and Vibration, Volume 2023, Issue 1, 2023., 2023
Aiming at the problem of the brittle fracture of pressure pipeline, the elastic constraint structure is described by using members and engineering building structures, and the concept of elastic constraint is proposed. Through the stress field analysis of the pressure pipeline under internal pressure, it is found that the pressure pipeline under ...
Yulin Li, Zhihui Li, Guangjian Dong
wiley   +1 more source

The effect of hydrogen on the fracture toughness of friction‐stir welded API 5L X70 pipeline steels

Fatigue &Fracture of Engineering Materials &Structures, Volume 45, Issue 10, Page 3009-3024, October 2022., 2022
Abstract The hydrogen embrittlement (HE) leads to severe steel degradation of mechanical properties. The hydrogen atoms diffuse into the steel and get positioned into reversible and irreversible trap sites. The pipe to transport oil and gas needs to be welded to construct long‐distance pipeline projects; thus, friction‐stir welding (FSW) has proven an ...
Joseane M. Giarola, Julian A. Avila, Osvaldo M. Cintho, Haroldo C. Pinto, Marcelo F. de Oliveira, Waldek W. Bose Filho   +5 more
wiley   +1 more source

Initiation of hydrogen induced cracks at secondary phase particles [PDF]

, 2020
The goal of this work is to propose a general mechanism for hydrogen induced crack initiation in steels based on a microstructural study of multiple steel grades.
Claeys, Lisa, De Seranno, Tim, Depover, Tom, Laureys, Aurélie, Pinson, Margot, Verbeken, Kim   +5 more
core   +3 more sources

Characterisation of the crack tip plastic zone in fatigue via synchrotron X‐ray diffraction

Fatigue &Fracture of Engineering Materials &Structures, Volume 45, Issue 7, Page 2086-2098, July 2022., 2022
Abstract This paper describes a new methodology for characterising the plastic zone ahead of a fatigue crack. This methodology is applied to a set of experimental data obtained by synchrotron X‐ray diffraction on a bainitic steel compact tension specimen.
Manuel Carrera, Alejandro S. Cruces, Joseph F. Kelleher, Yee‐Han Tai, John R. Yates, Philip J. Withers, Pablo Lopez‐Crespo   +6 more
wiley   +1 more source