The Weld Microstructure and Mechanical Properties of the Alloy 52 and Its Variants with Applied Electromagnetic Stirring during Welding

This study investigated the impact of electromagnetic stirring (EMS) on nickel-base alloy welds prepared with gas tungsten arc welding process. Alloy 52 and its variants, 52M 52MSS, were carefully evaluated their weld microstructure mechanical properties. The results showed that exhibited a typical dendrites, dendrites could be refined by stirring. Meanwhile, an application EMS, precipitates became smaller more evenly distributed in inter-dendritic areas. Ti(N,C)s, Nb/(Nb,Si)Cs, large-scale Laves phase (Nb,Mo,Ti)Cs present 52, 52M, 52MSS welds, respectively. With microstructure, both observed to have increase tensile strength, decrease elongations. Comparatively, for weld, strength was enhanced along slight elongation. Deep dense dimples dominant feature low-Nb-additions dendrite-like features found prevalent among welds. finer, while grew coarser.