An Experimental Study of Clearance Width Effects on the Strength of a Carbon Steel Brazed Joint

Abstract. Brazing welding is one of the important methods used injoining steel and other materials whether similar or dissimilar. In thiswork a set of experiments has been conducted to investigate theeffects of clearance width on the tensile, bending and torsion strengthof a low carbon steel butt weld joint. Experiments have proved thatthe joint strength increases with clearance width to reach a maximumvalue at a clearance width of (0.29-0.3mm). Metallographicobservations of the heat affected zone showed that the pearlaticstructure of the base metal has been replaced by a Widmannstattenstructure due to high heating temperature during the process ofwelding. The chemical composition analysis also proved that thebrazing material was contaminated by iron that diffused from thebase metal through the transition layer.