Structural and Mechanical Features of Laser-Welded Joints of Zinc-Coated Advanced Steel Sheets

We analyze the quality of laser-welded bodywork steel sheets. The welding was done by a CO 2 laser. We studied the welds made on steel sheets of advanced grades: high-strength low-alloy steel, dual phase steel, and multiphase transformed steel with induced plasticity. Both sides of steel sheets were...

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Bibliographic Details
Published in:Materials science (New York, N.Y.) N.Y.), 2019-07, Vol.55 (1), p.46-51
Main Authors: Viňáš, J., Brezinová, J., Brezina, J., Maruschak, P. O.
Format: Article
Language:English
Subjects:
Boron steel
Characterization and Evaluation of Materials
Chemistry and Materials Science
Degassing of metals
Hardness
Materials Science
Metals
Sheet-metal
Solid Mechanics
Specialty steels
Steel alloys
Structural Materials
Welding
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Summary:We analyze the quality of laser-welded bodywork steel sheets. The welding was done by a CO 2 laser. We studied the welds made on steel sheets of advanced grades: high-strength low-alloy steel, dual phase steel, and multiphase transformed steel with induced plasticity. Both sides of steel sheets were gal- vanized. The quality of welded joints was assessed by visual inspection. We performed the tensile tests of the specimens, including fracture tests. The Vickers microhardness was evaluated in the individual re- gions of joints. The macro- and microstructural analyses were performed by microscopy. The parame- ters recommended by the International Institute of Welding were used for welding. According to the da- ta of nondestructive and destructive tests, the analyzed welds were classified as satisfactory.
ISSN:1068-820X
1573-885X
DOI:10.1007/s11003-019-00250-x