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, micro structural, 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/mm 2 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 behaviour was obtained; dissimilar joint was fractured on the carbon steel side at 482 MPa and 0.35 stain.

Effect of Irradiation and Temperature on Microstructural Characteristic of FeCrAl Alloys

“…FeCrAl grade steels have high corrosion and oxidation resistance by forming a chemically resistant and passive chromium oxide layer [3,4]. In order to improve the resistance to high temperatures in the molten lead environment, a composite structure can also be created at the surface level by depositing a thin alumina layer (plasma spray deposition or laser cladding with powder) which will be then remelted using electron beam or laser processing, for creating a very adherent metalo-ceramic layer [5,6].…”

Pulsed Nd: YAG Laser Dissimilar Welding of Ti/Al3105 Alloys

“…Laser welding of alloys provides many advantages over conventional techniques such as great precision, super speed, great flexibility, high quality and low distortion [12][13][14][15][16][17][18][19][20]. Majumdar et al [9] have concluded that obtaining Al contents below 20 atom% in the Al-Ti mixing zone and crack free weld via the combination of any process parameters during Carbon Dioxide (CO 2 ) laser welding of Ti-6Al-4V and AlMg0.9Si is impossible.…”