Improving Laser Beam Welding Efficiency

Соколов, М. В.; Salminen, Antti

doi:10.4236/eng.2014.69057

Cited by 26 publications

(9 citation statements)

References 34 publications

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“…Excess penetrations are eliminated, and no further machining process for finishing in LBW welds compared to the arc welding process is needed. Microstructural changes are limited because of the low heat input with faster cooling rates [9][10][11][12][13][14][15]. In references [16,17], authors carried out a comparative study using both arc and electron beam welding process applied to 316L stainless steels; they found that metastable phases formed during solidification of fusion zone in EBW joints compared to that obtained with the GTAW process.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Metallurgical Properties of CO2 Laser Beam INCONEL 625 Welded Joints

Vemanaboina

Gundabattini

Akella³

et al. 2021

Applied Sciences

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In the frame of the circular economy, welding of Ni-based superalloys has gained increasing importance when applied, for instance, to repairing highly expensive components widely used in strategical sectors, such as the defense and aerospace industries. However, correct process parameters avoiding metallurgical defects and premature failures need to be known. To reach this goal, Inconel 625 butt-welded joints were produced by CO2 laser beam welding and different combinations of process parameters. The experimental investigation was carried out with three parameters in two levels with an L4 orthogonal array. Laser power, welding speed, and shielding gas flow rate were varied, and the results were reported in terms of mechanical properties, such as microhardness, tensile strength, distortion, residual stress, and weld bead geometry, and metallurgy. At a lower welding speed of 1 m/min, the full penetration was observed for 3.0 kW and 3.3 kW laser powers. However, sound welds (porosity-free) were produced with a laser power of 3.3 kW. Overall, the obtained full-penetration specimens showed a tensile strength comparable with that of the parent material with residual stresses and distortions increasing with the increase in heat input.

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Section: Introductionmentioning

confidence: 99%

Mechanical and Metallurgical Properties of CO2 Laser Beam INCONEL 625 Welded Joints

Vemanaboina

Gundabattini

Akella³

et al. 2021

Applied Sciences

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“…The Nd: YAG laser is used for very small dimensions of the material. They concluded that the preparation of the parts before welding, i.e., they have to be very clean and without pollutants [33][34][35][36][37][38][39][40][41][42][43][44][45]. However, the welding energy vaporizes some elements, so some defects could appear as cracks for instance.…”

Section: Ammsmsid0006838(2)2021mentioning

confidence: 99%

A Review: Welding by Laser Beam of Dissimilar Metals

Boumerzoug

2021

AMMS

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Laser welding has been widely used in different industrial fields. Laser welding is an interesting technology for joining dissimilar metallic materials. Welding of dissimilar metals by laser beam is new research filed. The objective of this paper is to review the previous research works on laser beam welding of dissimilar metallic materials. This paper presents the details of the laser welding technique and its application on the field of dissimilar welding. The most welded dissimilar metallic materials by laser were cited. Metallurgical aspects of some recent investigations dedicated to the joining of dissimilar metallic materials were also presented and discussed. The main advantages and disadvantages of the laser welding technique were mentioned.

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“…twin-spot laser welding) improved the quality of welded joints [13]. The use of a twin-spot laser beam reduces the hardness of steels by decreasing the percentage content of martensite in the microstructure [14].…”

Section: Introductionmentioning

confidence: 99%

Modified Twin-Spot Laser Welding of Complex Phase Steel

Różański¹,

Morawiec²,

Grajcar³

et al. 2016

Archives of Metallurgy and Materials

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The work addresses modified methods of twin-spot laser welding of complex phase steel sheets and investigates the effects of laser beam distribution on the macrostructure, microstructure and hardness. The research-related results were obtained for the beam power distributions of 50%-50%, 60%-40% and 70%-30%. Test joints were made using a Yb:YAG disc laser with a maximum power of 12 kW and a welding head by means of which it was possible to focus a laser beam on two spots. It was found that the change in the laser beam distribution affects geometrical features of the joint. The application of the second beam of lower power enables obtaining tempering-like effects, which finally lead to the beneficial hardness reduction both in the fusion zone and in heat-affected zone. The identification of various microstructural constituents in different zones of the joint was performed using light microscopic micrographs and scanning electron images.

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Improving Laser Beam Welding Efficiency

Cited by 26 publications

References 34 publications

Mechanical and Metallurgical Properties of CO2 Laser Beam INCONEL 625 Welded Joints

Mechanical and Metallurgical Properties of CO2 Laser Beam INCONEL 625 Welded Joints

A Review: Welding by Laser Beam of Dissimilar Metals

Modified Twin-Spot Laser Welding of Complex Phase Steel

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