Effect of Welding Speed in High Speed Laser-TIG Welding of Magnesium Alloy

Li, Chenbin; Chen, Minghua; Yuan, Shengtao; Liu, Liming

doi:10.1080/10426914.2012.700144

Cited by 19 publications

(5 citation statements)

References 18 publications

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“…The efficiency of welded joints for thin plates is directly improved by increasing welding speed [102] Hybrid welding of laser-tungsten inert gas (TIG) is a new technique for high speed welding [145]. In previous research, fusion welding methods such as arc welding and low power laser beam welding were used, but the welding speed was slow [149][150][151].…”

Section: Laser-tungsten Inert Gas (Laser-tig) Hybrid Weldingmentioning

confidence: 99%

“…Most welding rates, however, were below 2000 mm/min [152]. By increasing the welding speed from 2000 to 6,000 mm/min, Li et al [145] sought to examine the impact of welding rates on the microstructure and mechanical characteristics of high-speed welding through hybrid welding of AZ61 Magnesium alloy with laser-TIG technique. With the optimum welding speed of approximately 6000 mm/min, faulty free welds were achieved.…”

Section: Laser-tungsten Inert Gas (Laser-tig) Hybrid Weldingmentioning

confidence: 99%

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Welding of magnesium and its alloys: an overview of methods and process parameters and their effects on mechanical behaviour and structural integrity of the welds

et al. 2021

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An overview of welding methods and process parameters and its effects on mechanical behaviour and structural integrity of magnesium and its alloys are discussed. These alloys are less dense and beneficial structural alloys for improved energy efficiency, eco-friendliness and driver of circular economic model for sustainable design and innovative ecosystem. While the application of Mg-alloys is projected to increase, understanding the mechanical behaviour and structural integrity of welded joints are critical. Thus, fusion and solid-state welding processes of these alloys are discussed with emphasis on mechanical characterization. Laser welding is the most effective fusion welding technique for most Mg alloys whereas, the predominant solid-state method is friction stir welding. The importance of process variables such as heat inputs, welding velocity (speed) and post weld treatments on the microstructural evolution, on mechanical and physical properties of the distinct zones of the weld joints are described. The weldment is the most susceptible to failure due to phase transformation, defects such as microporosity and relatively coarse grain sizes after solidification. The implication of the design of quality weld joints of Mg alloys are explored with areas for future research directions briefly discussed.

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Section: Laser-tungsten Inert Gas (Laser-tig) Hybrid Weldingmentioning

confidence: 99%

Section: Laser-tungsten Inert Gas (Laser-tig) Hybrid Weldingmentioning

confidence: 99%

Welding of magnesium and its alloys: an overview of methods and process parameters and their effects on mechanical behaviour and structural integrity of the welds

et al. 2021

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“…In view of the above defects, it is of great significance to find a new welding method to improve the welding quality. Liu et al [4] concluded that increasing the proportion of He could shrink the arc by adjusting the ratio of Ar to He, and the best-welded joint was formed when the ratio was 1:1. He et al [5] proved that the weld pore rate was effectively reduced by adjusting the ratio of Ar and He in aluminium laser-MIG.…”

Section: Introductionmentioning

confidence: 99%

Microstructures and properties of TIG welded 5A06-Al: responses to variable Ar-He alternating supplying conditions

Dai

Miao

Nie

et al. 2022

Science and Technology of Welding and Joining

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During the TIG welding process, the interactions between arc plasma and molten pool could be periodically influenced by supplying Ar-He shield gas alternatively, which would affect the solidification and forming of the weld metal. In this work, the responses of microstructures and mechanical properties of the TIG welded 5A06 joint to the variable Ar-He alternating supplying conditions were investigated systematically. The variable shielding gas supply had a grain refining effect on the weld seam due to more violent and impacting effect on the molten pool. Moreover, the number of strengthening phases increased and became more dispersed, which increased the tensile strength further. The electrochemical experiment showed that the weld seam under continuous gas supply had better corrosion resistance.

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“…In order to accurately control the dissolution of base metals into the molten pool, a laser was introduced and formed a laser-TIG hybrid heat source. This heat source possesses better stability of the arc and higher energy density [ 28 , 29 , 30 ], which shows possibilities in Mg–Al dissimilar welding.…”

Section: Introductionmentioning

confidence: 99%

Influence of Welding Speed on Characteristics of Non-Axisymmetric Laser-Tungsten Inert Gas Hybrid Welded Mg/Al Lap Joints with Zn Filler

Wang

Liu

2020

Materials

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A non-axisymmetric laser-tungsten inert gas (TIG) heat source was designed to join Mg–Al dissimilar metals with pure Zn filler at a series of welding speeds (500–900 mm/min). Laser and TIG heat sources respectively acted on Al and Mg base metals to precisely control their dissolution into the welding pool. The solidification rate of liquid metal was controlled by adjusting the welding speed, then the reaction process of Mg, Al and Zn could be accurately regulated. The results indicated that various microstructures including Al solid solution, Zn solid solution, Mg–Zn intermetallic compounds (IMCs) and eutectic structure formed in the joint produced at different speeds. Lower welding speed (500 mm/min) caused the microstructure coarsening and higher welding speed (900 mm/min) would lead to the enrichment of MgZn2 intermetallic compounds. At the optimal welding speed of 800 mm/min in particular, fine MgZn2 IMCs grains uniformly distributed in the Al and Zn solid solution. The tensile-shear load reached a maximum of 1052.5 N/cm and the joint fractured at the fusion zone near the Al base metal.

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Effect of Welding Speed in High Speed Laser-TIG Welding of Magnesium Alloy

Cited by 19 publications

References 18 publications

Welding of magnesium and its alloys: an overview of methods and process parameters and their effects on mechanical behaviour and structural integrity of the welds

Welding of magnesium and its alloys: an overview of methods and process parameters and their effects on mechanical behaviour and structural integrity of the welds

Microstructures and properties of TIG welded 5A06-Al: responses to variable Ar-He alternating supplying conditions

Influence of Welding Speed on Characteristics of Non-Axisymmetric Laser-Tungsten Inert Gas Hybrid Welded Mg/Al Lap Joints with Zn Filler

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