Chemical and Mechanical Characterization of AISI 304 and AISI 1010 Laser Welding

Abstract

This paper addresses to the dissimilar laser welding of AISI 304 and AISI 1010 steel thin sheets. Cracks-free dissimilar edge fillet welds have been conducted using a Nd:YAG laser. Geometrical, microstructural, chemical, and mechanical proprieties of the welds were investigated using electron microscopy, EDS and tensile test assisted by digital image correlating. The proper results were achieved at an energy density of 88 J/mm² using a 0.4 mm laser spot diameter. An austenite-ferrite structure characterizes the weld bead and the precipitation of the chromium carbide at the grain limits was observed in the heat affected zone. Good tensile behavior was obtained; dissimilar joint was fractured on the carbon steel side at 482 MPa and 0.35 stain.

Keywords:

• Dissimilar
• Joining
• Laser
• Stainless
• Steels
• Strain
• Tensile
• Welding

ACKNOWLEDGMENTS

The authors wish to thank all members of Centro Láser—Technical University of Madrid, ETSI Caminos Canales Y Puertos—Technical University of Madrid and LAMET Laboratory—Bucharest, for their assistance in smooth conducting of experiments and carrying out the study.