On the influence of laser beam welding parameters for autogenous AA2198 welded joints

Examilioti, Theano N.; Kashaev, Nikolai; Enz, Josephin; Klusemann, Benjamin; Alexopoulos, Nikolaos D.

doi:10.1007/s00170-020-05893-8

Cited by 16 publications

(8 citation statements)

References 43 publications

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“…The obtained microstructure of the welded joints corresponds to the literature reports on joining Al-Cu alloys by a laser beam. The crystallized fusion zone has the lowest value of microhardness due to the dissolution of strengthening phases and according to the literature contains within the range of 60-110 HV0.1, depending on used welding parameters [19,[24][25]. Referring to this research it can be stated that the obtained values (85-95 HV0.1) are closest to the maximum value than to the minimum one (Figure 3).…”

Section: Fig 3 Microhardness Distribution Of the Welds Cross-sectionssupporting

confidence: 69%

“…The obtained joints are characterized by relatively high sizes of root reinforcement, especially the X8 sample, which has been produced with the lowest value of welding velocity (0.8 m/min). Taking into account its underfill, the conclusion can be drawn that this set of welding parameters has too high heat input [24]. On the other hand, the lowest welding velocity allowed to reduce the hydrogen porosity noticeably (Figure 2,7a).…”

Section: Fig 3 Microhardness Distribution Of the Welds Cross-sectionsmentioning

confidence: 97%

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Microstructure and Mechanical Properties of Sc-Modified AA2519-T62 Laser Beam Welded Butt Joints

Kosturek

Grzelak

Torzewski

et al. 2022

Advances in Materials Science

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The fundamental aim of the research is to investigate the microstructure and mechanical properties of the AA2519-T62 laser beam welded joints obtained with various values of welding velocity. For the constant value of laser power (3.2 kW) three joints have been produced with various values of welding velocity: 0.8, 1.1, and 1.4 m/min. The joints have been subjected to microstructure analysis (including both light and scanning electron microscope), microhardness measurements, tensile tests, and fractography of tensile samples. The established values of joint efficiency contain within the range of 55-66% with the highest value (66%) reported for the joint obtained with 1.1 m/min welding velocity. The produced welds have noticeable participation of pores, which tends to increase together with the value of welding velocity. In all cases, the failure has occurred in the fusion zone by ductile fracture.

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Section: Fig 3 Microhardness Distribution Of the Welds Cross-sectionssupporting

confidence: 69%

Section: Fig 3 Microhardness Distribution Of the Welds Cross-sectionsmentioning

confidence: 97%

Microstructure and Mechanical Properties of Sc-Modified AA2519-T62 Laser Beam Welded Butt Joints

Kosturek

Grzelak

Torzewski

et al. 2022

Advances in Materials Science

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“…Its design process parameters are laser power increased from 5 kW to 8 kW. They reported that the combination of high power and high welding speed is conducive to the formation of type I welds, thus improving the joint strength [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution and Mechanical Properties of 20%SiCp/Al Joint Prepared via Laser Welding

Jiang

et al. 2022

Materials

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SiC particles-reinforced Al matrix composites (SiCp/AMCs) have been widely used in the aerospace structural components. In this work, 20 vol% SiCp/2A14 joint was fabricated by laser welding technology. The effects of different laser power/welding velocity on the 20 vol% SiCp/2A14 joint forming, microstructure evolution and mechanical properties were studied in detail. The results showed that, under the same heat input, the high power/high welding velocity was beneficial to reduce the porosity of SiCp/2A14 joint and inhibited the formation of brittle phase of Al4C3. At 8 kW-133 mm/s welding parameters, the maximum tensile strength of the SiCp/2A14 joint reached 199 MPa, which is ~64% higher than that of the SiCp/2A14 joint prepared at 4 kW-66 mm/s welding parameters. By analyzing the fracture morphology and SEM image of SiCp/2A14 joint section, it is was found that the porosity of weld and Al4C3 brittle phase were the important factors limiting the strength of SiCp/2A14 joint. This work provides a reference for the process window design of laser welding SiCp/2A14 composites.

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“…greater than 10 6 W/cm 2 , which greatly improves the laser absorption rate of aluminum alloy [6,7]. Laser welding for aluminum alloy is gradually used in aerospace, vehicle, rail transportation and other fields due to its advantages of obvious weight loss, slight deformation and high welding efficiency [8,9]. However, laser welding exists the weaknesses of poor bridging ability and strict requirement of the joint gap [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of droplet transition on the dynamic behavior of the keyhole during 6061 aluminum alloy laser-MIG hybrid welding

Zhao

Xudong

et al. 2021

Int J Adv Manuf Technol

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On the influence of laser beam welding parameters for autogenous AA2198 welded joints

Cited by 16 publications

References 43 publications

Microstructure and Mechanical Properties of Sc-Modified AA2519-T62 Laser Beam Welded Butt Joints

Microstructure and Mechanical Properties of Sc-Modified AA2519-T62 Laser Beam Welded Butt Joints

Microstructure Evolution and Mechanical Properties of 20%SiCp/Al Joint Prepared via Laser Welding

Effect of droplet transition on the dynamic behavior of the keyhole during 6061 aluminum alloy laser-MIG hybrid welding

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