Simultaneous high-speed keyhole depth and absorptance measurements in laser spot welding of dissimilar metals

Allen, Troy R.; Fleming, Tristan G.; Krause, Tessa J.H.; Fraser, James M.

doi:10.1016/j.procir.2022.08.041

Cited by 2 publications

(1 citation statement)

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“…In some research papers, the keyhole is called vapor capillary, and its geometry is discussed in the manner of shape, size, and depth [14]. Since the keyhole behaves as an efficient point to absorb the laser energy, the relation of absorption rate between laser energy and welding speed is investigated with watercalorimetric method or integrated sphere radiometry [15] [16] [17]. Ideally the metals joining method aims to form the metallic bonds on the interface; however, in less favorable instances, it results in some defects like pores, undercuts, cracks, deformation and oxidation to a certain context [18] [19].…”

Section: Laser Beam-metal Interactionmentioning

confidence: 99%

Laser welding monitoring with multisensory data fusion: A brief review

Hsu,

Salminen

2023

IOP Conf. Ser.: Mater. Sci. Eng.

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As digital manufacturing is being implemented across industries, the automation of the laser welding process is a crucial step to enhance production efficiency. To monitor the in-situ welding process, there are several approaches to detect the electromagnetic and mechanical waves on various frequencies for comprehending laser beam-material interaction. Five sensing techniques, namely the optical microphone, welding camera, inline coherent imaging, infrared camera, and heat flux sensor, can be employed to identify distinct features in the laser welding process. These features include pore formation, melt pool geometry, weld bead topography, keyhole depth, and thermal distribution. The discussion of a proposed welding system designed with compatibility for multisensory data fusion is included, both on its capabilities and potential challenges, to offer guidance of welding monitoring.

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Section: Laser Beam-metal Interactionmentioning

confidence: 99%