Results 21 to 30 of about 27,379 (235)

Numerical Study on the Influence of the Plasma Properties on the Keyhole Geometry in Laser Beam Welding

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, Antonio D’Angola, Donato Sorgente   +2 more
doaj   +1 more source

Analysis and possible estimation of keyhole depths evolution, using laser operating parameters and material properties [PDF]

, 2018
The authors propose an analysis of the effect of various operating parameters on the keyhole depth during laser welding. The authors have developed a model that uses the analysis of the thermal field obtained in 2D geometry, which is mainly defined by ...
SCHNEIDER, Matthieu, Remy Fabbro, COSTE, Frédéric, Patrice Peyre, Valerie Gunenthiram, PEYRE, Patrice, FABBRO, Rémy, Frédéric Coste, Matthieu Schneider, Morgan Dal, GUNENTHIRAM, V, DAL, Morgan   +11 more
core   +1 more source

Multiple Reflections and Fresnel Absorption of Gaussian Laser Beam in an Actual 3D Keyhole during Deep-Penetration Laser Welding

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, Yuanyong Cheng, Licheng Zeng, Yufeng Zou, Honggui Zhang   +4 more
doaj   +1 more source

Effect of welding parameters on spatter formation in full-penetration laser welding of titanium alloys

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, Liangang Zhou, Qijun Li, Dong Du, Baohua Chang   +4 more
doaj   +1 more source

Keyhole Formation by Laser Drilling in Laser Powder Bed Fusion of Ti6Al4V Biomedical Alloy: Mesoscopic Computational Fluid Dynamics Simulation versus Mathematical Modelling Using Empirical Validation

Nanomaterials, 2021
In the laser powder bed fusion (LPBF) process, the operating conditions are essential in determining laser-induced keyhole regimes based on the thermal distribution.
Asif Ur Rehman, Muhammad Arif Mahmood, Fatih Pitir, Metin Uymaz Salamci, Andrei C. Popescu, Ion N. Mihailescu   +5 more
doaj   +1 more source

Physical mechanisms controlling keyhole and melt pool dynamics during laser welding [PDF]

, 2010
The aim of this chapter is to review our main recent understanding of physical mechanisms occurring during keyhole laser welding. The focus is on the analysis of melt pool dynamics showing that it is the interaction of the vapour plume emitted from the ...
R. Fabbro, FABBRO, Remy
core   +1 more source

Correlated effects of selection for immunity in White Leghorn chicken lines on natural antibodies and specific antibody responses to KLH and M. butyricum [PDF]

, 2008
Background The effect of selection for three general immune response traits on primary antibody responses (Ab) to Mycobacterium butyricum or keyhole limpet hemocyanin (KLH) was studied in four experimental lines of White Leghorn chicken.
Gourichon, David, Pinard-van der Laan Marie-Helen, Bertrand Bed'hom, Francis Minvielle, H. K. Parmentier, Gourichon David, Nieuwland, M.G.B., F. Minvielle, Pinard-van Der Laan, Marie-Hélène, G. Minozzi, Sandrine Mignon-Grasteau, Nieuwland Mike GB, Henk K Parmentier, Parmentier, Henk K., Nieuwland, Mike G.B., Gourichon, D., Mignon-Grasteau, Sandrine,, Mignon-Grasteau, S., Mignon-Grasteau Sandrine, Parmentier Henk K, Minvielle Francis, Marie-Helen Pinard-van der Laan, Minozzi, Giulietta, Mike GB Nieuwland, Mignon-Grasteau, Sandrine, M. G. B. Nieuwland, Parmentier, H.K., Nieuwland, Mike GB, Bed'hom Bertrand, Grasteau, Sandrine, B. Bed'Hom, Minvielle, Francis, Pinard-van der Laan, M.H., Giulietta Minozzi, David Gourichon, Pinard-van der Laan, Marie-Helen, Minozzi, G., M. Pinard van der Laan, Parmentier, Henk, Bed'Hom, Bertrand, D. Gourichon, S. Mignon Grasteau, Minvielle, F., Pinard Van Der Laan, Marie-Hélène, Minozzi Giulietta, Bed'hom, B.   +45 more
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Numerical Simulation of Molten Pool Dynamics in Laser Deep Penetration Welding of Aluminum Alloys

Crystals, 2022
In this paper, the numerical simulation of molten pool dynamics in laser deep penetration welding of aluminum alloys was established based on the FLUENT 19.0 software.
Jin Peng, Hongqiao Xu, Xiaohong Yang, Xingxing Wang, Shuai Li, Weimin Long, Jian Zhang   +6 more
doaj   +1 more source

Experimental and numerical study on laser keyhole welding of 42CrMo under air and argon atmosphere [PDF]

, 2017
Laser keyhole welding of 42CrMo in air and argon atmospheres has been studied both experimentally and numerically. Significant macroscale difference is observed for welding carried out under argon and air shielding.
郑彩云, 胡耀武, 虞钢, 李少霞, He, XL, 宁伟健, Yu, G (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Adv Mfg, Beijing 100190, Peoples R China., 何秀丽, Hu, YW   +8 more
core   +1 more source

Online Detection of Keyhole Status in a Laser-MIG Hybrid Welding Process

Metals, 2022
During laser-metal inert gas (MIG) hybrid welding, a large amount of welding status information is generated in droplet transfer, keyhole and molten pool.
Xi’an Fan, Xiangdong Gao, Yuhui Huang, Yanxi Zhang   +3 more
doaj   +1 more source