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
Materials Science, Multidisciplinary
A. Zavdoveev, P. Zok, V Pozniakov, M. Rogante, T. Baudin, M. Heaton, A. Gaivoronskiy, S. Zhdanov, P. Acquier, T. Solomijchuk, V Kostin, M. Skoryk, I Klochkov, S. Motrunich
Summary: Thermomechanically cold processed (TMCP) steels with high strength are widely used in constructions due to their fine-grained structure and low carbon content. However, the welding technology for such steels poses challenges, mainly due to the complex behavior of TMCP structure under the welding thermal cycle effect.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Elias Hoffmann de Lima, Diego Tolotti de Almeida, Daniel Souza, Kleber Eduardo Bianchi, Hardy Mohrbacher
Summary: The application of press hardening steels is expanding to other industries, such as agriculture and road transport. This article investigates the fatigue performance of GMAW-CSC and PAW welding methods on 1500 MPa press hardening steel. The results indicate that both welding methods provide suitable fatigue performance, especially after grinding the weld bead.
Article
Materials Science, Multidisciplinary
Qin Wang, Xiaobao Zhou, Qiao Ma, Tangqing Wu, Meng Liu, Minghua Zhang, Zhi Li, Fucheng Yin
Summary: The corrosion behavior of X80 pipeline steel welded joints by sulfate-reducing bacteria (SRB) has been explored. It was observed that in the sterile medium, the heating affected zone (HAZ) showed larger and deeper corrosion pits compared to the base metal (BM) and weld zone (WZ). However, in the inoculated medium, Desulfovibrio desulfuricans (D. desulfuricans) primarily attached to the BM and WZ, increasing their local corrosion sensitivity. D. desulfuricans showed a dislike for attaching to the HAZ surface, leading to non-uniform corrosion dominating the surface.
Article
Materials Science, Multidisciplinary
Kitae Kwon, Gyeonghyeon Fang, Wooyeol Kim, Sangho Uhm, Taekyung Lee, Chong Soo Lee
Summary: Type-C liquid metal embrittlement (LME) cracks affect the high-cycle fatigue resistance of TRIP steel joined using resistance spot welding (RSW), with varying impacts on tensile behavior in different deformation modes.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Jinxin Gou, Ruyu Nie, Xiao Xing, Zili Li, Gan Cui, Jianguo Liu, Xiangyuan Deng, Y. Frank Cheng
Summary: Impact and slow strain rate tensile tests, as well as molecular dynamics modeling, were used to investigate hydrogen-induced cracking in a welded X80 pipeline steel. The results showed that the highest susceptibility to cracking occurred in the coarse-grained heat-affected zone, where intergranular brittle fracture was observed. Hydrogen atoms delayed dislocation emissions and the accumulated energy was primarily released through crack initiation. Interestingly, the locations of crack initiation were not necessarily areas with the highest concentration of hydrogen atoms but were consistently at the multi-node grain boundaries.
Article
Nanoscience & Nanotechnology
Atakan Baris Ozturan, Guerkan Irsel, Betuel Nur Guezey
Summary: This research investigates the dissimilar welding of Hardox 450 and S355J2C+N steels using GMAW method, revealing differences in microstructure and mechanical properties. The study found that the welded joint exhibited variations in hardness and strength, with a high joint efficiency.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Mechanical
Hamid Reza Ghanbari, Mahmoud Shariati, Elahe Sanati, Reza Masoudi Nejad
Summary: This paper investigates the fatigue behavior of resistance spot welding in ferrite-martensite dual-phase steel joints. The effects of different welding parameters and the adhesive on hybrid joints are evaluated. The results show that electric current has the most significant impact on fatigue life of the joints, but its effectiveness diminishes as it increases.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Chemistry, Physical
Chilou Zhou, Pengzhi Dai, Hao Wu, Mohan He, Xianhui Liu, Paul K. Chu
Summary: This study investigates the relationship between ferrite morphology and hydrogen embrittlement (HE) in welded austenitic stainless steel. The results show that the morphology of ferrite influences the resistance to HE, with skeletal ferrite showing the highest resistance and lathy ferrite showing the lowest resistance.
APPLIED SURFACE SCIENCE
(2022)
Article
Optics
Wei Sun, Shushuai Liu, Fuqiang Guo, Dongting Wu, Yongang Zhang, Yong Zou
Summary: This paper comparatively investigated the droplet transfer behavior between flux-cored arc welding and laser-flux cored arc hybrid welding, proposing a new parameter to evaluate welding stability and identifying different droplet transfer modes. The laser influenced droplet transfer but did not significantly impact the process stability between hybrid welding and FCAW.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Xiaohui Zhao, Gen Liu, Desheng Xu, Chunhua Hu, Yu Liu
Summary: Oxide particles induced by the water environment affect the fatigue life of X80 pipeline steel welded joints, and specific grain orientations make fatigue crack more prone to propagation in the water environment.
Article
Automation & Control Systems
Dawei Zhao, Yuriy Bezgans, Nikita Vdonin, Vladimir Kvashnin
Summary: The study reveals significant impacts of welding heat input on the geometric features, microstructures, and mechanical performances of weld beads in gas metal arc welding. Moderate welding heat input results in higher weld strength and failure energy, while insufficient or excessive heat input leads to reduced mechanical properties.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Jan Schubnell, Phillip Ladendorf, Ardeshir Sarmast, Majid Farajian, Peter Knoedel
Summary: This study proposes a validated approach for extending the service life of steel structures by repairing commonly used weld details. Through cyclic loading, crack detection, and repair, the fatigue life of the repaired specimens was found to at least match that of the original specimens, showing an improvement in the repair of welded joints in infrastructure buildings.
Article
Engineering, Civil
Zhilong Dong, Xue-fang Xie, Jingwen Li, Yu Wan, Chaolei Wang
Summary: In this research, the formation of the heterogeneous microstructure of duplex stainless steel electric resistance welding joints (ERWJ) was analyzed, and their mechanical properties were investigated through tensile and fatigue tests. The results revealed that the ferrite phase dominated the entire ERWJ, particularly at the energized area. The failure occurred along the weld edge due to residual stress and island-like austenite. The distribution of fatigue life showed a turning point at 19.5 MPa, providing a permissible range of stress amplitudes and reinforcement strategies for the plate-shell heat exchanger ERWJ in engineering.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Hanji Park, Cheolho Park, Junghoon Lee, Hyunbin Nam, Byungrok Moon, Younghoon Moon, Namhyun Kang
Summary: The study showed that the HSC resistivity of transverse weld joints was inferior to that of base metal, with fractures tending to occur in the inter-critical heat affected zone under hydrogen charging conditions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
