Results 41 to 50 of about 12,885 (266)

T1 Over Squared Proton Density Ratio to Characterize Multiple Sclerosis Lesions

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Differentiating remyelinated from demyelinated lesions in MS remains challenging without histological confirmation. This study introduces the T1‐to‐PD2 ratio (TPR) imaging approach and evaluates its ability to characterize MS lesions alongside other quantitative MRI (qMRI) metrics. Methods Thirty individuals with MS (mean age: 47.5 ± 
Sarah J. Wright, Scotty G. McKay, Jean Ramos Bou, Fen Bao, Vivian B. Truong, Chenyang Li, Li Jiang, Anza B. Memon, E. Mark Haacke, Yulin Ge, Yongsheng Chen   +10 more
wiley   +1 more source

Corrosion behavior of X100 pipeline steel and its heat-affected zones in simulated Korla soil solution under alternating current interference

工程科学学报, 2020
In recent years, many accidents caused by alternating current (AC) corrosion have been reported. AC corrosion has become a serious potential damage to buried steel pipelines.
Yong YANG, Xin-hua WANG, Ying-chun CHEN, Kai-ling WEI   +3 more
doaj   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +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

Research progress of hydrogen compatibility testing methods and hydrogen embrittlement prevention measures for pipeline steel

You-qi chuyun, 2023
Understanding the causes of hydrogen embrittlement and its detrimental effects is essential for ensuring the integrity of pipeline steel. Various testing methods, including slow strain rate and fatigue life testing, are commonly employed to evaluate the ...
WANG Yuchen, WU Qian, LIU Huan, KANG Zetian   +3 more
doaj   +1 more source

Karl Popper and the Mechanisms of Hydrogen Embrittlement

Advanced Engineering Materials, EarlyView.
Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
wiley   +1 more source

Stress corrosion cracking behavior of pipeline steel due to liquid ammonia with water and oxygen impurities

You-qi chuyun
ObjectiveClassified as a high-strength low-alloy steel, pipeline steel is suitable for large-scale, long-distance pipeline transportation of liquid ammonia.
Jiaqing LI, Huilong LIANG, Zhiyu FENG, Pengbo YIN, Lin TENG, Zhuwu ZHANG, Yu LUO, Lilong JIANG   +7 more
doaj   +1 more source

Hydrogen‐Assisted Fracture of Iron‐Based Fe–Ni–Al Alloys

Advanced Engineering Materials, EarlyView.
Principal relations and fracture mechanisms of single‐phase and precipitate‐strengthened Fe–Ni–Al alloys subjected to prior electrochemical hydrogen charging are identified. The mechanisms of hydrogen effect on strength and microhardness are discussed, including hydrogen‐induced increase in microhardness and the role of hydrogen in fracture behavior ...
Nataliya Yadzhak, Olha Zvirko, Rostyslav Leshchak, Hryhoriy Nykyforchyn   +3 more
wiley   +1 more source

Nondestructive Testing of Welded Composite Metal Foams

Advanced Engineering Materials, EarlyView.
X‐ray computed tomography (CT) is used to evaluate welded steel–steel composite metal foam (CMF) joints of two density classes. It reports variation in postweld spatial void distribution and correlates it to weld‐induced changes, mechanical performance, and failure within welded CMF panels.
Chinmaya Prerana Inguva, Aman Kaushik, Afsaneh Rabiei   +2 more
wiley   +1 more source

Development of X90 submerged-arc helical welded pipe with diameter of 1 524 mm

You-qi chuyun, 2020
The use of high pressure, large diameter and high steel grade pipelines for long-distance natural gas transportation have become an important development tendency in the pipeline industry. The application of X90 pipeline steel pipe can raise the pipeline
Yun LIU, Hui NIU, Aijun NIU, Hongbo ZHAO, Wei LIU   +4 more
doaj   +1 more source