Laser Welding

Oliveira, J.P.; Zeng, Zhi

doi:10.3390/met9010069

Cited by 3 publications

(1 citation statement)

References 15 publications

(15 reference statements)

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“…Improving the dimensional shape and performance of the weld joint helps to prevent weld distortion in the order of 50%-90%. 9,10 Laser welding is a joining technology characterized by small heat-affected and fusion zones, minimal or nonexistent distortions, 11,12 precision, reliability, [13][14][15] and the possibility of making dissimilar joints. [16][17][18][19][20] Ou et al 3 studied the effect of different vibration frequencies on Inconel 718 weld joints' microstructure.…”

Section: Introductionmentioning

confidence: 99%

Vibration-assisted laser welding: Frequency and amplitude vibration effect on the microhardness of A36 steel

Vidal

Barrionuevo

Ramos‐Grez

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Laser welding is one of the most versatile welding techniques for joining advanced materials. However, thermal cycles induced around weld lines generate residual stresses and inhomogeneous plastic deformation during the welding process. Vibratory weld conditioning is an alternative to enhance the mechanical properties of metal sheets during casting and welding. This study aims to analyze the effects of vibration on the microhardness of the resolidified melt zone after a laser weldment. Two 1 mm thick A36 steel sheets were welded in lap configuration using a CO2 laser, with varying vibration amplitudes up to 0.56 mm peak-to-peak and frequencies up to 1034 Hz. We confirmed that mechanical vibrations during the welding process alter the final properties of the joint compared to non-vibrated samples. Based on the experimental results, vibration can either increase or decrease the bead's final microhardness in a range of [−5%, 7%] by controlling the frequency and vibration amplitude. Furthermore, average microhardness was predicted by applying several machine learning regressors, showing an accuracy of ±3%, denoting the usefulness of the random forest and AdaBoost algorithms provide.

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Section: Introductionmentioning

confidence: 99%

Vibration-assisted laser welding: Frequency and amplitude vibration effect on the microhardness of A36 steel

Vidal

Barrionuevo

Ramos‐Grez

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Formation of a single drop of molten steel following bursting of liquid film in a vertical steel plate illuminated by a high energy laser

et al. 2021

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Experimental Evaluation of ND: YAG Laser Parameters and Sample Preparation Methods for Texturing Thin AISI 316L Steel Samples

Kozłowska,

Grabska-Zielińska

2023

Applied Sciences

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In mechanical and material engineering, the effect of laser texturing depends on many factors besides device specification, primarily the properties of the materials being processed, and, secondly, the preparation of the sample. Laser texturing of thin (<5 mm) samples is mostly performed utilizing short-pulse lasers, but depending on the power of the laser beam, the process can also be performed by using continuous operation lasers. When using a laser beam to modify the surface layer, special attention should be paid to the surface preparation process. Engraving a shiny metal surface can lead to laser beam dispersion and energy loss. Some materials require special preparation and surface darkening in order to be effectively engraved. In the case of engraving, maximizing the efficiency and repeatability of the process is the key to obtaining the desired properties. The aim of the conducted study was to establish satisfying parameters and a sample preparation method for texturing thin AISI 316L samples. Appropriately selected laser parameters added to proper sample preparation. The sanding, etching, and darkening of the surface layer improved the quality of the weld and eliminated problems such as deformation and spark formation that often occur with raw samples during the texturing process.

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Laser Welding

Abstract: Welding technologies are critical to most relevant engineering applications [...]

Cited by 3 publications

References 15 publications

Vibration-assisted laser welding: Frequency and amplitude vibration effect on the microhardness of A36 steel

Vibration-assisted laser welding: Frequency and amplitude vibration effect on the microhardness of A36 steel

Formation of a single drop of molten steel following bursting of liquid film in a vertical steel plate illuminated by a high energy laser

Experimental Evaluation of ND: YAG Laser Parameters and Sample Preparation Methods for Texturing Thin AISI 316L Steel Samples

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