Results 11 to 20 of about 27,379 (235)
Biofilms of foodborne pathogenic bacteria: how important are they? [PDF]
Microbiology Australia, 2022 Biofilms are recognised as an important mode of life in bacteria. All species of foodborne bacterial pathogens are known to form biofilms in vitro under the right growth conditions.
Gary A. Dykes
doaj
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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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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Processing of Copper by Keyhole-Gas Tungsten Arc Welding for Uniformity of Weld Bead Geometry [PDF]
, 2020 Keyhole gas tungsten arc welding (K-GTAW) was applied to characterize the weld bead geometry in case of the 6 mm thick electrolytic tough pitch copper.
Yadav, Ashish +4 more
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Melt Pool and Keyhole Behavior Analysis for Deep Penetration Laser Welding [PDF]
, 2010 One usually defines the main characteristic of the welding performances of a given laser system by its “penetration curve” that corresponds to the welding depth as a function of the welding speed Vw for a given set of operating parameters.
R Fabbro, Fabbro, R, FABBRO, Rémy
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Interaction time and beam diameter effects on the conduction mode limit [PDF]
, 2012 Laser welding has two distinctive modes: keyhole and conduction mode. Keyhole mode is characterized by deep penetration and high welding speeds, while conduction mode has higher quality welds with no defects or spatter.
Assunção, Eurico +2 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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