Laser Wobble Welding Process: A Review on Metallurgical, Mechanical, and Geometrical Characteristics and Defects

Sanati, Shahin; Nabavi, Seyedeh Fatemeh; Esmaili, Reihaneh; Farshidianfar, Anooshiravan

doi:10.1007/s40516-024-00252-x

Lasers Manuf. Mater. Process.

2024

DOI: 10.1007/s40516-024-00252-x

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Laser Wobble Welding Process: A Review on Metallurgical, Mechanical, and Geometrical Characteristics and Defects

Shahin Sanati,

Seyedeh Fatemeh Nabavi,

Reihaneh Esmaili

et al.

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2024

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Mechanisms of Increasing Weld Depth during Temporal Power Modulation in High‐Power Laser Beam Welding

Grajczak,

Reynders,

Nowroth

et al. 2024

Adv Eng Mater

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Understanding the fundamental mechanisms of action for increasing weld depth during temporal power modulation in laser beam welding could allow dissimilar rotational welding without the introduction of concomitant turbulence, but with enhanced intermixing. The investigations are conducted on 30 mm‐diameter round bars of stainless steel alloy 1.4301 and nickel base alloy 2.4856 utilizing a 16 kW disk laser beam source. Modulation frequencies are 0/50/100/200 Hz at low, medium, and high amplitudes of laser beam power. The influence on the process and weld characteristics is investigated through high‐speed imaging with grayscale analysis, keyhole depth measurements, metallographic sections, and energy‐dispersive X‐ray spectroscopy analysis. The objectives are successfully achieved, and the underlying mechanism is maintaining the keyhole depth at a higher level for modulation frequencies of 200 Hz and a high amplitude of laser beam power, which is related to the keyhole inertia. Based on this, a novel welding mode with a constant keyhole depth is proposed. Furthermore, up to 20% increase in weld depth is achieved, a saturation limit for the modulation frequency is identified, intermixing within the weld is enhanced, and a model for predicting the weld depth based solely on measurements of the surface width is developed.

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Mechanisms of Increasing Weld Depth during Temporal Power Modulation in High‐Power Laser Beam Welding

Grajczak,

Reynders,

Nowroth

et al. 2024

Adv Eng Mater

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show abstract

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Laser Wobble Welding Process: A Review on Metallurgical, Mechanical, and Geometrical Characteristics and Defects

Cited by 1 publication

References 100 publications

Mechanisms of Increasing Weld Depth during Temporal Power Modulation in High‐Power Laser Beam Welding

Mechanisms of Increasing Weld Depth during Temporal Power Modulation in High‐Power Laser Beam Welding

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