Identification of Optimum Laser Beam Welding Process Parameters for E110 Zirconium Alloy Butt Joint Based on Taguchi-CFD Simulations

Ti-6Al-4V is an alloy that is increasingly used in aeronautics due to its high mechanical properties coupled with the lightness. An effective technology used to manufacture titanium components with a reduced buy to fly ratio is the laser beam welding. Previous studies showed that the key factor that rules the mechanical properties and the fatigue life of the joint is its morphology. The aim of this paper was to investigate the influence of the main process parameters, such as welding speed and laser power, on the geometrical features of the joint, in terms of undercut, underfill, reinforcement and so on. 3.0 mm thick Ti-6Al-4V rolled sheets were welded in butt joint configuration by using a Nd-YAG laser source. The joint performances were studied in terms of weld morphology, microstructure and Vickers microhardness. Then, defects such as underfill and reinforcement, controlling the whole weld morphology, were observed, and the relationship between the occurrence, the entity of these defects and the process parameters was studied.

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Neural networks based prediction modelling of hybrid laser beam welding process parameters with sensitivity analysis

SN Applied Sciences ◽

10.1007/s42452-019-1264-z ◽

2019 ◽

Vol 1 (10) ◽

Author(s):

Sudipto Chaki

Keyword(s):

Neural Networks ◽

Sensitivity Analysis ◽

Laser Beam ◽

Process Parameters ◽

Laser Beam Welding ◽

Welding Process ◽

Prediction Modelling

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Laser welding of current collector foil stacks in battery production–mechanical properties of joints welded with a green high-power disk laser

The International Journal of Advanced Manufacturing Technology ◽

10.1007/s00170-021-07839-0 ◽

2021 ◽

Author(s):

Sophie Grabmann ◽

Johannes Kriegler ◽

Felix Harst ◽

Florian J. Günter ◽

Michael F. Zaeh

Keyword(s):

Laser Beam ◽

Lithium Ion Batteries ◽

Process Parameters ◽

High Power ◽

Weld Seam ◽

Production Systems ◽

Laser Beam Welding ◽

Welding Process ◽

Lithium Ion ◽

Current Collector

AbstractThe qualification of production systems that enable reliable and stable production processes is a major challenge in manufacturing large-format lithium-ion batteries. During cell assembly, the electrode sheets of the anode and the cathode are stacked, and are electrically contacted by a welding process. It was shown that laser beam welding employing a beam source in the green wavelength range is a promising joining approach in terms of high productivity. Therefore, the influence of the process parameters, such as the laser power, the welding speed, the pulse frequency, and the pulse duration, on the weld seam quality was investigated. Particular emphasis was placed on the mechanical strength of the weld seam. Statistically planned experiments were used to determine feasible parameter sets for welding the most common current collectors of lithium-ion battery electrodes, copper (Cu), and aluminum (Al). The influence of the individual process parameters on the tensile shear force was evaluated. Stacks of 40 metal foils were welded with a thin metal sheet in lap joint configuration. Based on an analysis of the requirements for minimum mechanical seam strengths, this study confirms that laser beam welding using a green high-power disk source is an auspicious process for the internal contacting of lithium-ion batteries.

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