Results 21 to 30 of about 2,359 (228)

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

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

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

Desulfovibrio vulgaris as a model microbe for the study of corrosion under sulfate‐reducing conditions

mLife, Volume 1, Issue 1, Page 13-20, March 2022., 2022
Abstract Corrosion of iron‐containing metals under sulfate‐reducing conditions is an economically important problem. Microbial strains now known as Desulfovibrio vulgaris served as the model microbes in many of the foundational studies that developed existing models for the corrosion of iron‐containing metals under sulfate‐reducing conditions. Proposed
Toshiyuki Ueki, Derek R. Lovley
wiley   +1 more source

Microstructure and Strengthening/Toughening Mechanisms of Heavy Gauge Pipeline Steel Processed by Ultrafast Cooling

Metals, 2020
Heavy gauge pipeline steels experience a low qualification in drop-weight-tear test properties because of the low cooling capability of conventional thermomechanical controlled processing.
Xue-qiang Wang, Guo Yuan, Jin-hua Zhao, Guo-dong Wang   +3 more
doaj   +1 more source

Phenomenological 2D and 3D Models of Ductile Fracture for Girth Weld of X80 Pipeline

Buildings, 2023
Welding is the main method for oil/gas steel pipeline connection, and a large number of girth welds are a weak part of the pipeline. Under extremely complex loads, a steel pipeline undergoes significant plastic deformations and eventually leads to ...
Naixian Li, Bin Jia, Junhong Chen, Ying Sheng, Songwen Deng   +4 more
doaj   +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

Elimination and Control of δ Ferrite in M50NiL Bearing Steel

Advances in Materials Science and Engineering, Volume 2022, Issue 1, 2022., 2022
In this study, the effects of the annealing temperature and holding time on the δ ferrite content in M50NiL bearing steel are evaluated. The results indicate that when the temperature increases from 900°C to 1200°C, the δ ferrite content increases as a result of the increase in the Cr equivalent in the matrix, which decreases the stability of austenite
Bing Li, Zhiwei Wu, Dong Lang, Wenxiong Chen, Xiaoqiang Wang, Shuai Wang, Jun Zhang, Jian Mao, Tomasz Trzepieciński   +8 more
wiley   +1 more source

Effect of Alternating Stray Current and Stress on the Corrosion Behavior of X80 Pipeline Steel in Soil Simulated Solution

International Journal of Electrochemical Science, 2018
The corrosion behavior of X80 pipeline steel in 3.5 wt.% NaCl solution and simulated Dagang soil solution under different alternating current (AC) electrical densities was studied using the weight loss method, and was tested and analyzed using the ...
Xinhua Wang, Xuting Song, Yingchun Chen, Zuquan Wang   +3 more
doaj   +1 more source

Method for detection of deformation stress of large-diameter and high-pressure pipeline under complex terrain

You-qi chuyun, 2020
China-Russia Eastern Gas Pipeline is characterized by ultra-large diameter, high grade steel (X80) and high pressure rating. It is located in the area with geologically active permafrost and semi-permafrost zones in the north, where is prone to ...
Yukun LI, Yuxing LI, Yu ZHANG, Peng LIU, Wenguang YU   +4 more
doaj   +1 more source