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Numerical modelling and experimental validation of the effect of laser beam defocusing on process optimization during fiber laser welding of automotive press-hardened steels

Journal of Manufacturing Processes, 2021
Automated robotic laser welding is commonly used for the joining of thin-gauge sheet metals for automotive applications due to the precision and speed of the welding process.
M. S. Khan   +5 more
semanticscholar   +1 more source

Multi-Objective Parameter Optimization of Fiber Laser Welding Considering Energy Consumption and Bead Geometry

IEEE Transactions on Automation Science and Engineering, 2022
Exploiting energy-saving potentials while obtaining ideal processing results is highly sought for in fiber laser welding (FLW) applications. However, little is known about the correlation between energy consumption and bead geometry of FLW, which is ...
Jianzhao Wu   +4 more
semanticscholar   +1 more source

Effect of the laser-induced vapor in the keyhole on the weld surface roughness in fiber laser welding

Journal of Laser Applications, 2022
Weld surface roughness is an important criterion for evaluating weld quality. The main factors that affect weld surface roughness in fiber laser keyhole welding are identified by an in situ observation of the dynamic behavior of a keyhole mouth and by analyzing the eruption characteristics of the laser-induced vapor on the front keyhole wall (FKW).
Jianglin Zou   +5 more
openaire   +1 more source

Optimization of fiber laser welding parameters for high strength aluminium alloy AA7075-T6

Materials Today: Proceedings, 2021
High strength aluminium alloy sheets are widely used in automobile industry for manufacturing super lightweight vehicles. The high strength to weight ratio possessed by these Al alloys helps in reducing the total weight of the vehicle without affecting ...
P. Dhanaraj, C. Rathinasuriyan
semanticscholar   +1 more source

On the interaction of microstructural morphology with residual stress in fiber laser welding of austenitic stainless steel

, 2021
The development of compressive residual stress is governed by the metallurgical transformation and associated microstructure, which in turn influences the mechanical properties of a welded structure.
B. Kumar   +5 more
semanticscholar   +1 more source

Instantaneous phenomena during the pulsed fiber laser welding of pure zirconium in a hyperbaric environment

Optics Communications, 2021
The instantaneous evolutions of the molten pool and plasmas during the pulse fiber laser welding of pure zirconium (Zr) under different high pressure environment were explored.
J. Long, Lin-Jie Zhang, J. Ning, S. Na
semanticscholar   +1 more source

Investigation of dissimilar fiber laser welding of low carbon steel and stainless steel by numerical simulation

, 2021
A three-dimensional numerical simulation model is developed in this paper to analyze the symmetry of weld geometry and the homogeneity of alloy distribution in the molten pool during the dissimilar fiber laser welding of low carbon steel and stainless ...
Ai Yuewei   +3 more
semanticscholar   +1 more source

Study on laser welding of copper material by hybrid light source of blue diode laser and fiber laser

Journal of laser applications, 2021
Focusing on the problem of high-power laser welding of high reflectivity of copper, in this article, a physical model of energy absorption for the temperature field of hybrid laser deep penetration welding of copper materials is established by using a ...
Hang Yang   +12 more
semanticscholar   +1 more source

Femtosecond fiber laser welding of dissimilar metals

Applied Optics, 2014
In this paper, welding of dissimilar metals was demonstrated for the first time, to the best of our knowledge, by using a high-energy high-repetition-rate femtosecond fiber laser. Metallurgical and mechanical properties were investigated and analyzed under various processing parameters (pulse energy, repetition rate, and welding speed).
Huan, Huang   +3 more
openaire   +2 more sources

Numerical analysis of the influence of molten pool instability on the weld formation during the high speed fiber laser welding

International Journal of Heat and Mass Transfer, 2020
The dynamic behaviors of the molten pool play a critical role in determining the weld bead formation process and the welded joints quality. A numerical simulation modeling method is proposed to investigate the instability of the molten pool and ...
Yuewei Ai   +3 more
semanticscholar   +1 more source

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