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Effect of Beam Energy on Weld Geometric Characteristics in Nd:YAG Laser Overlapping Spot Welding of Thin AISI 304 Stainless Steel Sheets

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Abstract

Weld geometric characteristics in laser overlapping spot welding of 0.6-mm AISI 304 stainless steel sheets were investigated. A pulsed Nd:YAG laser with maximal average power of 150 W was used for welding experiments with different laser beam energies in the range of 3.5 J to 6.2 J, keeping all other processing parameters constant. The main objective of these experiments was to study the effect of energy changes and to identify the welding mode in dependency on the beam effective peak power density. Each weld surface and its cross section were analyzed using a laser scanning confocal microscope. The spot diameter on the specimen, weld width, and penetration depth were measured. Three-dimensional surface reconstruction was realized to describe the effect of energy changes on weld surface properties.

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Acknowledgments

This research work was cofunded by the Academy of Sciences of the Czech Republic within the support of Project no. KAN301370701. The financial support of the European Union under the FP7 Project no. 222279 is gratefully acknowledged.

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Authors and Affiliations

  1. Joint Laboratory of Optics, Palacky University and Institute of Physics of the Academy of Sciences of the Czech Republic, 17. listopadu 50a, 77207, Olomouc, Czech Republic

    Hana Lapsanska (Ph.D. Student), Hana Chmelickova (Research and Development Specialist) & Miroslav Hrabovsky (Professor and Head of the Department)

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  1. Hana Lapsanska
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  2. Hana Chmelickova
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  3. Miroslav Hrabovsky
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Correspondence to Hana Lapsanska.

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Manuscript submitted October 22, 2009.

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Lapsanska, H., Chmelickova, H. & Hrabovsky, M. Effect of Beam Energy on Weld Geometric Characteristics in Nd:YAG Laser Overlapping Spot Welding of Thin AISI 304 Stainless Steel Sheets. Metall Mater Trans B 41, 1108–1115 (2010). https://doi.org/10.1007/s11663-010-9399-8

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  • DOI: https://doi.org/10.1007/s11663-010-9399-8

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