Results 1 to 10 of about 40,382 (313)

Operando X-Ray Tomoscopy of Laser Beam Welding. [PDF]

Adv Sci (Weinh)
AbstractThe phenomena occurring in a weld seam during advancement of a laser beam over a metallic component are still under dispute. The occurrence and evolution of porosity and the occasional blowout of melt need to be understood. Here, a recently developed X‐ray tomoscopy setup is applied, providing one hundred 3D images per second to capture the ...
Kamm PH, Börner S, Neu TR, Schlepütz CM, Dittrich D, Banhart J, García-Moreno F.   +6 more
europepmc   +5 more sources

Optimization of the solidification conditions by means of beam oscillation during laser beam welding of aluminum

Materials & Design, 2018
Aluminum (AA6016) sheets were welded in overlap configuration to investigate the influence of different beam oscillation patterns on the resulting temperature gradient, the local solidification rate and the resulting grain structure and to compare the ...
Christian Hagenlocher, Martin Sommer, Florian Fetzer, Rudolf Weber, Thomas Graf   +4 more
doaj   +2 more sources

Direct Glass-to-Metal Welding by Femtosecond Laser Pulse Bursts: II, Enhancing the Weld Between Glass and Polished Metal Surfaces [PDF]

Nanomaterials
We present a comprehensive study on the femtosecond laser direct welding of glass and metal, focusing on optimizing processing parameters and understanding the influence of material properties and beam shaping on welding quality.
Qingfeng Li, Fei Luo, Gabor Matthäus, David Sohr, Stefan Nolte   +4 more
doaj   +2 more sources

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, Jianglin Zou, Jiejie Xu, Qiang Wu, Rongshi Xiao   +4 more
doaj   +1 more source

Effects of Beam Shape on the Microstructures and Mechanical Properties during Thin-Foil Laser Welding

Metals, 2023
In this study, a fiber laser at a wavelength of 1070 nm with different beam shapes (spot, dough-nut, and spot-wobble) was used to weld thin 316 L stainless steel foils.
Danbi Song, Ryoonhan Kim, Kwangdeok Choi, Dongsig Shin, Sujin Lee   +4 more
doaj   +1 more source

Effect of oscillation frequency on the mechanical properties and failure behaviors of laser beam welded 22MnB5 weld

Journal of Materials Research and Technology, 2023
Al–Si coated 22MnB5 steel is a lightweight material that helps significantly reduce vehicle weight and fuel consumption. In this article, the effect of different oscillation frequencies on the fraction of α-ferrite, the cross-sectional shape ...
Wei Xu, Wu Tao, Haiwen Luo, Shanglu Yang
doaj   +1 more source

Effects of Reduced Ambient Pressure and Beam Oscillation on Gap Bridging Ability during Solid-State Laser Beam Welding

Journal of Manufacturing and Materials Processing, 2020
In recent decades, beam welding processes have been set up as a key technology for joining applications in automotive engineering and particularly in gearbox manufacturing.
Markus Köhler, Tamás Tóth, Andreas Kreybohm, Jonas Hensel, Klaus Dilger   +4 more
doaj   +1 more source

Mechanical and Metallurgical Characterisation of CO2 Laser Beam Welding AISI 4130 and AISI 310 Sheets of Steel

Journal of Mechanical Engineering, 2021
Laser Beam Welding (LBW) is the fusion welding technique in which coalescence is produced by heating the work piece by impingement of concentrated beam of laser light.
Reddy Bijivemula Narayana, Hema Pothur, Reddy Chevireddy Eswara   +2 more
doaj   +1 more source

A review: Suppression of the solidification cracks in the laser welding process by controlling the grain structure and chemical compositions

Journal of Advanced Joining Processes, 2023
Laser beam welding of miscellaneous material combinations is an effective joining technology useful for diverse industrial applications because it can provide high speed, flexibility, and precision.
Mohammadhossein Norouzian, Mahdi Amne Elahi, Peter Plapper   +2 more
doaj   +1 more source

Local Shielding Gas Supply in Remote Laser Beam Welding

Journal of Manufacturing and Materials Processing, 2021
The use of shielding gases in laser beam welding is of particular interest for materials interacting with ambient oxygen, e.g., copper, titanium or high-alloy steels. These materials are often processed by remote laser beam welding where short welds (e.g.
Klaus Schricker, Andreas Baumann, Jean Pierre Bergmann   +2 more
doaj   +1 more source