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Multi-stage keyhole evolution in fiber laser welding: An experimental study and theoretical analysis
Results in Physics, 2021 Laser welding with high beam intensity generates a metal vapor, which partially displaces the metal melt, forming a narrow keyhole-shaped fusion zone. This study conducted theoretical analysis of the keyhole formation processes within fiber laser welding,
Shihui Guo +4 more
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Structural analysis of traditional Chinese hidden-keyhole padlocks [PDF]
Mechanical Sciences, 2018 Hidden-keyhole padlocks use a plate or some other means to cover the keyhole and are a category of traditional Chinese padlocks. The topological structures of traditional hidden-keyhole padlocks have distinct arrangements in the operation.
K.-H. Hsiao
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Mechanism of keyhole pore formation in metal additive manufacturing
npj Computational Materials, 2022 During metal additive manufacturing, the porosity of the as-built part deteriorates the mechanical property and even hinders the further application of metal additive manufacturing.
Lu Wang +3 more
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Preventing Evaporation Products for High-Quality Metal Film in Directed Energy Deposition: A Review
Metals, 2021 Directed energy deposition (DED), a type of additive manufacturing (AM) is a process that enables high-speed deposition using laser technology. The application of DED extends not only to 3D printing, but also to the 2D surface modification by direct ...
Kang-Hyung Kim +3 more
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Metals, 2023 In the magnetically controlled Plasma-GMAW welding process, the composite arc forms a keyhole in the workpiece to be welded. In order to explore the effect of process parameters on arc coupling, weld pool and keyhole, and the behavior characteristics of ...
Xinglin Miao +5 more
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Metals, 2021 Hybrid laser arc welding (HLAW) features advantages such as higher welding speed and gap tolerance as well as smaller welding deformation and heat-affected zone than arc welding.
Leilei Wang +3 more
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Metals, 2018 High-power fiber laser welding is an efficient and effective way to produce heavy section structures. However, there is a significant challenge in producing the welds with free of imperfections such as nail-head-shaped welds, spatters, and root sagging ...
Mingjun Zhang +4 more
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Frontiers in Physics, 2022 Keyhole laser welding is the benchmark for deep-penetration joining processes. It needs high incident laser beam power densities at the workpiece surface to take place. The gaseous phase plays a fundamental role to keep the deep and narrow keyhole cavity
Donato Coviello +2 more
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International Journal of Optics, 2012 In deep penetration laser welding, a keyhole is formed in the material. Based on an experimentally obtained bending keyhole from low- and medium-speed laser penetration welding of glass, the keyhole profiles in both the symmetric plane are determined by ...
Xiangzhong Jin +4 more
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Journal of Materials Research and Technology, 2021 The spatter formation process was observed by high-speed imaging during the full-penetration laser welding (FPLW) process of 4 mm-thick TC4 alloy plates. The effects of process parameters on spatter formation were studied.
Hao Cheng +4 more
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