Laser-MIG arc hybrid welding of aluminium alloy - Comparison of melting characteristics between YAG laser and diode laser

Wang, J; Takenaka, Yoshiaki; Hongu, Toshinori; Fujii, Kouji; Katayama, Seiji

doi:10.1533/wint.2007.3681

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…Laser-arc hybrid welding reportedly has the highest gap tolerance, that is, about 1.0mm [3]. In addition, laser-arc hybrid welding is known to prevent welding joint defects better than laser autogenous welding [4,5]. In this study, we evaluated the gap bridging capability and the crack sensitivity during welding of Al 5J32 and 6K21 sheets, Al alloys used in automatic vehicles.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Crack Sensitivity and Gap Bridging Ability during Laser Butt Welding of Aluminum 5J32 and 6K21 Alloys

Ahn

Kim

2011

MSF

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Growing demand to reduce fuel consumption has accelerated the application of Al sheets to the body structure of automobiles. While recent studies on laser welding of Al 5xxx series and Al 6xxx series alloys have examined weldability, the laser autogenous welding usually results in low gap bridging capability and weld defects such as porosity, underfill, cracking, and so on. In this study, we evaluated the gap bridging capability and the crack sensitivity during laser autogenous welding, laser welding with filler wire, and laser-arc hybrid welding, respectively. Al 5J32 and 6K21 sheets were used as the base metal and Al 4xxx series and Al 5xxx series wires were used as the filler metal. Employing adequate welding conditions, the gap bridging capability during butt welding was investigated for each welding process. To clarify the solidification crack sensitivity, bead-on-plate welding was implemented for a tapered specimen as a self-restraint crack test. Compared with the laser autogenous welding, laser welding with filler wire and the laser-arc hybrid welding showed improved gap bridging capability and reduced crack sensitivity.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Crack Sensitivity and Gap Bridging Ability during Laser Butt Welding of Aluminum 5J32 and 6K21 Alloys

Ahn

Kim

2011

MSF

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“…Hybrid-welding investigations are focused on high power density (laser power > 1000 W) laser-metal inert/active gas (MIG/MAG) arc hybrid welding of thick steel plates and Al alloys to satisfy the industrial demands of shipbuilding and car manufacturing in recent years [6]- [10]. The industrial application of laser-MIG/MAG hybrid welding is achieved in shipbuilding and car manufacturing [11], [12].…”

Section: Introductionmentioning

confidence: 99%

Behavior and Spectrum Analysis of Welding Arc in Low-Power YAG-Laser–MAG Hybrid-Welding Process

Liu

Huang

Song

et al. 2008

IEEE Trans. Plasma Sci.

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The behavior and emission spectrum of hybridwelding arc plasmas are investigated in low-power YAG lasermetal active gas (MAG) arc hybrid-welding process, comparing with simple MAG welding case. The electron temperature and electron density of local arc plasma, deducing, respectively, from the Boltzmann plot method and Stark broadening mechanism, are analyzed in this paper. The conditions of local thermodynamic equilibrium (LTE) of arc plasma and self-absorption of emission spectral lines are discussed. The results indicate that laserinduced attraction and constriction of hybrid arc root are generated in low-power laser hybrid-welding process, and they make the synergy effect between laser and MAG arc increase. Comparing with simple MAG welding case, a zone above laser-heated spot with higher electron temperature and greater electron density is seen in hybrid-welding process. The maximal values of electron temperature and electron density of hybrid arc in this zone are about 1.56 ± 0.09 × 10 4 K and 1.61 ± 0.16 × 10 17 cm −3 , respectively. The welding arc plasmas are in the state of LTE, and none of the lines selected from emission spectrum of arc plasma is affected by self-absorption.Index Terms-Arc attraction and constriction, electron density, electron temperature, emission spectrum, local thermodynamic equilibrium (LTE), YAG laser-metal active gas (MAG) hybrid welding.

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Coupling of Laser with Plasma Arc to Facilitate Hybrid Welding of Metallic Materials: A Review

Srivatsan

et al. 2012

J. of Materi Eng and Perform

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Laser-MIG arc hybrid welding of aluminium alloy - Comparison of melting characteristics between YAG laser and diode laser

Cited by 7 publications

References 3 publications

Evaluation of Crack Sensitivity and Gap Bridging Ability during Laser Butt Welding of Aluminum 5J32 and 6K21 Alloys

Evaluation of Crack Sensitivity and Gap Bridging Ability during Laser Butt Welding of Aluminum 5J32 and 6K21 Alloys

Behavior and Spectrum Analysis of Welding Arc in Low-Power YAG-Laser–MAG Hybrid-Welding Process

Coupling of Laser with Plasma Arc to Facilitate Hybrid Welding of Metallic Materials: A Review

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