Article
Nanoscience & Nanotechnology
Xiao Xing, Ran Cheng, Gan Cui, Jianguo Liu, Jinxin Gou, Chao Yang, Zili Li, Feng Yang
Summary: In this study, the temperature dependence of hydrogen embrittlement in X90 steel was investigated through experimental tests and molecular dynamics simulations. The results revealed a temperature threshold for hydrogen embrittlement at 313 K, beyond which hydrogen embrittlement weakened and below which it was enhanced.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Jiaqing Li, Ziyue Wu, Lijie Zhu, Zhuwu Zhang, Lin Teng, Liang Zhang, Cheng Lu, Rui Wang, Che Zhang
Summary: The influence of temperature on hydrogen diffusion and hydrogen embrittlement of X80 steel was studied. The results showed that the hydrogen diffusion and subsurface hydrogen concentration in the steel increased with increasing temperature. Macro slow strain rate tensile tests and microstructural analysis revealed a temperature threshold THE, max of 315 K for hydrogen-induced embrittlement susceptibility. The determination of THE, max is crucial for determining test temperatures in hydrogen-related engineering material applications.
Article
Chemistry, Physical
R. H. Duan, Y. Q. Wang, Z. A. Luo, G. D. Wang, G. M. Xie
Summary: In this study, the relationship among microstructure, hydrogen diffusivity, and hydrogen embrittlement behavior of friction stir welded X100 pipeline steel was investigated. The highest effective hydrogen diffusion coefficient was observed at a rotation rate of 600 rpm, while the lowest diffusion coefficient was obtained at 300 rpm. The decrease in rotation rate effectively inhibited the elongation loss of the material.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Erik Koren, Catalina M. H. Hagen, Dong Wang, Xu Lu, Roy Johnsen, Junichiro Yamabe
Summary: This study investigated the hydrogen uptake and diffusivity in X65 pipeline steel using the permeation technique under various hydrogen charging conditions. Hydrogen charging was conducted using hydrogen gas at different pressures and electrochemical charging at different cathodic current densities. The results demonstrated that both the sub-surface hydrogen concentration in lattice and reversible trap sites and the effective hydrogen diffusivity were influenced by the charging conditions. Additionally, the relationship between equivalent hydrogen fugacity and overpotential was determined.
Article
Nanoscience & Nanotechnology
Margo Cauwels, Robin Depraetere, Wim De Waele, Stijn Hertele, Kim Verbeken, Tom Depover
Summary: This study investigates the hydrogen-assisted ductility loss of API 5L X70 pipeline steel and finds that the steel becomes more brittle after hydrogen charging. Notched samples are more susceptible to hydrogen embrittlement compared to unnotched samples, and hydrogen signatures in the form of fisheyes and quasi-cleavage are detected on the fracture surface.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Thorsten Michler, Fabien Ebling, Heiner Oesterlin, Carl Fischer, Ken Wackermann
Summary: Developing engineering standards for the hydrogen economy requires extensive materials testing. One method is using tubular specimens for testing. This study compares the tensile properties of X60 pipeline steel tested in high pressure gaseous hydrogen using tubular and conventional specimens.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Nanoscience & Nanotechnology
D. Wang, A. B. Hagen, P. U. Fathi, M. Lin, R. Johnsen, X. Lu
Summary: This study investigates the effect of hydrogen on X65 carbon steel through tensile tests under different conditions. The fractured samples were characterized using various techniques, revealing a significant reduction in fracture elongation and the presence of secondary cracks under in-situ hydrogen charging conditions. Additionally, cracks were found to initiate at the interfaces of inclusions and the matrix, and propagate along specific slip planes.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Zhiwei Gao, Baoming Gong, Quanjun Xu, Dongpo Wang, Caiyan Deng, Yang Yu
Summary: The study investigates the mutual effect of hydrogen, microstructures, and stress concentration on the fatigue failure of X65 steel welded joints under different environmental conditions. It was found that weld metal and coarse grain heat-affected zone are more prone to hydrogen embrittlement and cyclic strain localization in air.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Cuiwei Liu, Hongchao Yang, Cailin Wang, Huimin Zhang, Rui Ding, Lina Ai, Xin Fan, Rui Zhang, Xiusai Xu, Yuanxing Ning, Frank Cheng, Yuxing Li
Summary: The tensile properties of X80 pipeline steel in hydrogen blended natural gas environments with different H2/CH4/CO contents are investigated through slow strain rate tensile experiments. Mechanical properties and fracture morphologies are further analyzed. The results show that the presence of CH4/CO can inhibit the hydrogen embrittlement susceptibility of X80 steel, and the inhibition mechanisms are discussed. The inhibition on hydrogen embrittlement of X80 steel is stabilized when the CH4 contents increase above 20 vol%. By comparison, the inhibitory effect of CO is more significant.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Nanoscience & Nanotechnology
Dong Wang, Anette Brocks Hagen, Di Wan, Xu Lu, Roy Johnsen
Summary: The hydrogen effect on X65 carbon steel was studied, revealing minimal impact on elastic behavior but significant influence on dislocation nucleation and hardness, especially with a more pronounced effect on hardness in bainite.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Peng Wang, Wenqian Hao, Jiamiao Xie, Fang He, Fenghui Wang, Chunyong Huo
Summary: The study investigates the stress triaxial constraint and fracture toughness properties of X90 pipeline steel to advance the engineering application of high-strength pipeline steel.
Article
Chemistry, Physical
Peng Zhang, Majid Laleh, Anthony E. Hughes, Ross K. W. Marceau, Tim Hilditch, Mike Yongjun Tan
Summary: Although studies on hydrogen embrittlement have been conducted for a long time, there is a lack of systematic research on the susceptibility of steels to hydrogen embrittlement under different electrochemical charging conditions. This study focuses on this knowledge gap by evaluating the behavior of a typical pipeline steel (X65) after hydrogen-charging in different electrolytes that simulate industrial environments. The results show that the susceptibility to hydrogen embrittlement of X65 steel varies significantly with the hydrogen-charging electrolytes and, to a lesser extent, with the electrochemical charging variables.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Shi Zheng, Yi Qin, Wenchao Li, Feifei Huang, Yujie Qiang, Shiwei Yang, Lei Wen, Ying Jin
Summary: The permeation of hydrogen in X80 steel was studied through thermal desorption spectroscopy, stepwise hydrogen permeation experiments, and finite element modeling. Shallow and deep traps were identified in X80 steel, and their binding energies were obtained. Deep traps significantly impede the initial hydrogen permeation process but have little effect during subsequent charging. The stepwise hydrogen charging experiments were conducted to obtain the apparent diffusion coefficients and hydrogen trap density in X80 steel. A hydrogen permeation model was established based on quantitative relationships and hydrogen trap binding energies.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Fengjun Lang, Feng Huang, Jiangbo Yue, Liwei Li, Jinqiao Xu, Jing Liu
Summary: The hydrogen embrittlement susceptibility of X70 grade, acid-resistant, submarine pipeline steel with Mg treatment was studied. The hydrogen diffusion and trapping behavior in the tested steels treated with different Mg content were analyzed. The results showed that micro/nano-composite inclusions obtained via Mg treatment have a greater activation energy of hydrogen desorption and can trap more hydrogen, reducing its diffusion coefficient in the steel.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Y. Lei, E. Hosseini, L. Liu, C. A. Scholes, S. E. Kentish
Summary: This study provides a theoretical analysis of the permeability of coatings used as internal coatings of transmission pipelines to prevent hydrogen embrittlement. The study evaluates coating materials suitable for existing steel pipelines and finds that crosslinked poly (vinyl alcohol) coatings show the highest potential in reducing hydrogen permeation and preventing embrittlement. Modeling results demonstrate that using PVA coatings can significantly reduce hydrogen concentration on the steel surface and offer better protection.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)