A Novel Approach to Inhibit Intergranular Corrosion in Ferritic Stainless Steel Welds Using High-Speed Laser Cladding

Ferritic stainless steels are prone to localized corrosion phenomena such as pitting or intergranular corrosion, in particular when jointed by fusion welding processes. State-of-the-art techniques avoid mainly consist of alternating alloy concepts post-weld heat-treatments—all which associated with increased production costs. Hence, the present investigation seeks introduce a novel approach for inhibition ferritic steel welds through use high-speed laser cladding. Here, vulnerable sites along weld seam area coated chemically resistant alloy, whereby an overlap is achieved. Optical and electron microscopy well computer tomography tensile tests reveal that detrimental effects both stabilized unstabilized substantially reduced. In addition that, varying widths on identified studied. Moreover, resulting dilution precipiation at clad–sheet interface thoroughly characterized backscatter diffraction energy dispersive X-ray spectroscopy, interrelationships resistance can be drawn. As result this investigation, number enlarged, substantial cost-saving potentials manufacturing industry unlocked.