The effect of laser beam wobbling mode in welding process for structural steels

Kuryntsev, S. V.; Gil'mutdinov, A. Kh.

doi:10.1007/s00170-015-7312-y

Cited by 42 publications

(24 citation statements)

References 19 publications

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“…Due to the high quality, high efficiency, and unrelenting repeatability, lasers have been widely applied in many materials processing processes, such as welding [7][8][9][10][11][12][13], cutting [14][15][16], additive manufacturing [17][18][19][20], and so on, and they have been used to process many types of materials, including metals, ceramics, glass, and polymers. Owing to the high power density, the laser generally results in welds with high precision and a small heat affected zone (HAZ) and, therefore, is considered as a good candidate to join the tiny sintered NdFeB components.…”

Section: Introductionmentioning

confidence: 99%

Influences of Laser Spot Welding on Magnetic Property of a Sintered NdFeB Magnet

Chang

et al. 2016

Metals

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Laser welding has been considered as a promising method to join sintered NdFeB permanent magnets thanks to its high precision and productivity. However, the influences of laser welding on the magnetic property of NdFeB are still not clear. In the present paper, the effects of laser power on the remanence (Br) were experimentally investigated in laser spot welding of a NdFeB magnet (N48H). Results show that the Br decreased with the increase of laser power. For the same welding parameters, the Br of magnets, that were magnetized before welding, were much lower than that of magnets that were magnetized after welding. The decrease in Br of magnets after laser welding resulted from the changes in microstructures and, in turn, the deterioration of magnetic properties in the nugget and the heat affected zone (HAZ) in a laser weld. It is recommended that the dimensions of nuggets and HAZ in laser welds of a NdFeB permanent magnet should be as small as possible, and the magnets should be welded before being magnetized in order to achieve a better magnetic performance in practical engineering applications.

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Section: Introductionmentioning

confidence: 99%

Influences of Laser Spot Welding on Magnetic Property of a Sintered NdFeB Magnet

Chang

et al. 2016

Metals

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“…The focus position was corrected taking into account the shift of focal length when passing across a material . A wobble beam trajectory was used . Optimized laser parameters of both, BTS.2SiO 2 and BTS.3SiO 2 glass sealant systems are displayed in Table .…”

Section: Methodsmentioning

confidence: 99%

Processing technologies for sealing glasses and glass‐ceramics

Pablos-Martín

Rodríguez-López

Pascual

2020

Int J of Appl Glass Sci

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This paper embraces two different approaches for the joining of materials through glass sealants. First, the conventional method of furnace sealing in which paste technology is normally employed. The glass sealant is applied in powder form mixed with agglomerant and with the help of dispenser robots, tape casting, or screen printing. Glass-ceramics for sealing of solid oxide fuel cells (SOFC) are described as an example of this type of processing. Glass composition, thermal properties, particle size of the glass powder, sintering and crystallization competition, and final crystalline phases together with a suitable chemical compatibility with the metallic and ceramic elements to be sealed need to be carefully adjusted for this specific application. Second, laser welding is presented as an alternative sealing technology. A general overview about laser welding through glass sealants is presented. Particularly, the welding of sapphire and fused silica glass through a BTS.2SiO 2 thin film glass sealant by employment of a nanosecond-pulsed laser is detailed. Laser parameters (frequency, power, scan speed, and number of passes) were optimized to get the best molten conditions of the BTS thin film, while allowing its crystallization. BTS crystallization upon laser welding leads to a strong blue emission upon UV excitation. Finally, both processing technologies were compared. K E Y W O R D Sadherence, crystallization, fresnoite, furnace sealing, glass-ceramics, laser welding, sinteringThis is an open access article under the terms of the Creat ive Commo ns Attri bution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…This critical procedure can be solved by using the twin spot laser technique with filler wire or hybrid arc-laser welding, but will decrease the welding speed. One of the ways to solve this problem is the use of laser beam wobbling mode [11,12,[44][45][46][47][48][49][50].…”

Section: Welding Techniques Examinedmentioning

confidence: 99%

Study and Characterization of EN AW 6181/6082-T6 and EN AC 42100-T6 Aluminum Alloy Welding of Structural Applications: Metal Inert Gas (MIG), Cold Metal Transfer (CMT), and Fiber Laser-MIG Hybrid Comparison

Cornacchia

Cecchel

2020

Metals

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The present research investigates the effects of different welding techniques, namely traditional metal inert gas (MIG), cold metal transfer (CMT), and fiber laser-MIG hybrid, on the microstructural and mechanical properties of joints between extruded EN AW 6181/6082-T6 and cast EN AC 42100-T6 aluminum alloys. These types of weld are very interesting for junctions of Al-alloys parts in the transportation field to promote the lightweight of a large scale chassis. The weld joints were characterized through various metallurgical methods including optical microscopy and hardness measurements to assess their microstructure and to individuate the nature of the intermetallics, their morphology, and distribution. The results allowed for the evaluation of the discrepancies between the welding technologies (MIG, CMT, fiber laser) on different aluminum alloys that represent an exhaustive range of possible joints of a frame. For this reason, both simple bar samples and real junctions of a prototype frame of a sports car were studied and, compared where possible. The study demonstrated the higher quality of innovative CMT and fiber laser-MIG hybrid welding than traditional MIG and the comparison between casting and extrusion techniques provide some inputs for future developments in the automotive field.

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The effect of laser beam wobbling mode in welding process for structural steels

Cited by 42 publications

References 19 publications

Influences of Laser Spot Welding on Magnetic Property of a Sintered NdFeB Magnet

Influences of Laser Spot Welding on Magnetic Property of a Sintered NdFeB Magnet

Processing technologies for sealing glasses and glass‐ceramics

Study and Characterization of EN AW 6181/6082-T6 and EN AC 42100-T6 Aluminum Alloy Welding of Structural Applications: Metal Inert Gas (MIG), Cold Metal Transfer (CMT), and Fiber Laser-MIG Hybrid Comparison

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