The influence of laser pulse waveform on laser–TIG hybrid welding of AZ31B magnesium alloy

Song, Gang; Luo, Zhimin

doi:10.1016/j.optlaseng.2010.08.011

Cited by 35 publications

(4 citation statements)

References 12 publications

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“…5,7 For example, Song and Luo discussed the influence of laser waveform on the penetration depth in the TIG-laser hybrid welding of magnesium alloys. 16 Chen et al also studied the influence of the shape of the laser pulse, arc current and Dla on the welding characteristics of CO 2 laser-TIG hybrid welding process, while the effect of the relationship between the parameters on the welding process has hardly been taken into account. 7 In this paper, two different hybrid welding modes (laser-TIG mode and TIG-laser mode) are applied in magnesium alloy welding processes.…”

Section: Introductionmentioning

confidence: 99%

Effect of relative location of laser beam and TIG arc in different hybrid welding modes

Liu

Yuan

2012

Science and Technology of Welding and Joining

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The laser leading hybrid welding mode [laser tungsten inert gas (laser-TIG)] and TIG leading hybrid welding mode (TIG-laser) were utilised in the magnesium alloy welding process. The effects of TIG arc current and the distance between laser beam and TIG electrode (Dla) on penetration depth and melting efficiency in different hybrid welding modes were investigated. Results reveal that there is a decided difference in variation trend of penetration depth with Dla in different welding modes. The penetration depth increases first and then decreases with the Dla increasing from 1 to 7 mm in TIG-laser hybrid welding mode while the penetration depth decreases monotonously with Dla in laser-TIG hybrid welding mode. The increase percentage of melting efficiency remains at ,20% in laser-TIG hybrid welding mode while the increase percentage fluctuates acutely and achieves the maximal value (,53?14%) at the arc current of 120 A in TIG-laser hybrid welding mode.

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Section: Introductionmentioning

confidence: 99%

Effect of relative location of laser beam and TIG arc in different hybrid welding modes

Liu

Yuan

2012

Science and Technology of Welding and Joining

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“…It can be demonstrated that severe plastic deformation can heal the defects to some degree. In recent years, the laser-arc hybrid was found to be an effective method to combine a high-power laser and adaptable arc, which was beneficial to realize a high build rate and low defect rate [195,196]. Miao et al [193] and Wu et al [66] reported the Al-Si and Al-Cu alloys fabricated by laser-arc hybrid AM, which combines the advantages of WAAM and LAM, with the ascendancy of low price, high deposition rate and high cooling rate over individual LDED technologies, as shown in figure 17(f), acquiring fine mechanical properties.…”

Section: Field-assisted Lded Of Al Alloysmentioning

confidence: 99%

Review on laser directed energy deposited aluminum alloys

Liu,

Chen,

Qiu

et al. 2024

Int. J. Extrem. Manuf.

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The lightweight aluminum (Al) alloys have been widely used in frontier fields like aerospace and automotive industries, which attracts great interest in additive manufacturing to process high-value Al parts. As a mainstream additive manufacturing technique, laser directed energy deposition (LDED) shows good scalability to meet requirements for large-format components manufacturing and repairing. However, LDED Al alloys are highly challenging due to the inherent poor printability (e.g., low laser absorption, high oxidation sensitivity and cracking tendency). To further promote the development of LDED high-performance Al alloys, this review gains a deep understanding of the challenges and strategies to improve printability in LDED Al alloys. The porosity, cracking, distortion, inclusions, elements evaporation and resultant inferior mechanical properties (than laser powder bed fusion) are the key challenges in LDED Al alloys. Processing parameter optimizations, in-situ alloy design, reinforcing particle addition and field assistance are the efficient approaches to improve the printability and performance of LDED Al alloys. The underlying correlations between processes, alloy innovation, characteristic microstructures, and achievable performances in LDED Al alloys are discussed. The benchmarking mechanical properties and primary strengthening mechanism of LDED Al alloys are summarized. This review aims to provide a critical and in-depth evaluation of current progress in LDED Al alloys. The future opportunities and perspectives in LDED high-performance Al alloys are also outlooked.

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“…There have been a number of valuable studies on laser-TIG hybrid welding of magnesium alloys. However, most of the welding speeds are less than 2,000 mm=min [11,12]. In this article, the weldability tests have been performed on thin sheets of magnesium alloy AZ61 using low power laser-TIG hybrid welding at the welding speed ranging from 2,000 to 6,000 mm=min.…”

Section: Please Scroll Down For Articlementioning

confidence: 99%

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

Chen

Yuan

et al. 2012

Materials and Manufacturing Processes

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In order to investigate the effect of welding speed on microstructures and mechanical properties in high speed welding, low power laser-tungsten inert gas (laser-TIG) hybrid welding process is proposed on AZ61 magnesium alloy. Defect-free welds are produced by employing welding speed ranging from 2,000 mm/min to 6,000 mm/min. It is found that welding speed has a significant influence on microstructures and mechanical properties of the joints. Results indicate that with rapid increasing of welding speed, both the liner energy and average grain size decrease on the premise that fully-penetrated joints with no macroscopic porosities or cracks are obtained. The microhardness in the weld fusion zone increases with the welding speed. It is also found that the tensile strength decreases after an increase with the increase in welding speed. The fracture mode changes from mixture fracture of ductile and brittle to typical intergranular fracture feature.

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The influence of laser pulse waveform on laser–TIG hybrid welding of AZ31B magnesium alloy

Cited by 35 publications

References 12 publications

Effect of relative location of laser beam and TIG arc in different hybrid welding modes

Effect of relative location of laser beam and TIG arc in different hybrid welding modes

Review on laser directed energy deposited aluminum alloys

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

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