Effect of ultrafine particles of activating fluxes on the laser welding process

Parshin, S. G.; Parshin, S. S.; Bürkner, G.; Semmler, W.; Kusch, Mario; Henig, T.; Khun, S.

doi:10.1080/09507116.2011.566727

Cited by 9 publications

(1 citation statement)

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“…To achieve this goal, it is suggested [25][26][27][28][29][30] that a thin deposited layer of activating flux powder on the surface of welding material can significantly improve the low-power laser welding efficiency through enhancing the laser-material coupling and heating more evenly throughout the thickness of materials. This action can result in faster formation of laser-induced plasma leading to a faster peak temperature achievement and shorter overall thermal cycle with less incidence of thermal stress.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Employment of fiber laser technology to weld austenitic stainless steel 304 l with aluminum alloy 5083 using pre-placed activating flux

et al. 2015

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Fadzil, Employment of fiber laser technology to weld Austenitic stainless steel 304 L with Aluminum alloy 5083 using pre-placed activating flux, (2015), AbstractThe overlapping welding was carried out in keyhole mode between austenitic stainless steel 304 L and aluminum alloy 5083 using a low power fiber laser in continuous irradiation. The significant content of magnesium as the alloying element with low boiling point and high vapor pressure inside the AA 5083 matrix can induce the spatter formation and depression on surface of the weld beads upon laser beam absorption and temperature growth which can deteriorate the mechanical properties and appearance of the joints. To reduce these defects, a variety of single and multi-components activating fluxes including oxide-based TiO 2 and halide-based CaF 2 flux powders were pre-placed on the surface of welding material prior to laser welding. The EDX and XRD analyses in addition to microhardness and shear tests were carried out to characterize the joints. The obtained results showed that, the oxide and halide activating fluxes can significantly improve the joints' strength up to 1.48 and 1.85 times in average respectively compared with autogenous joint. It was deduced that the simultaneous effect of significant decrease in joints' surface depression leading to welds' geometry improvement in addition to less formation of interfacial Fe-Al intermetallics, were the major causes for considerable strength improvements.

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