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Weld defects and precipitates of deposited metal in 9Ni steel welded joint
Three kinds of electrode with different niobium contents were developed and compared, and the influence of alloying elements on microstructure and mechanical properties was summarized. Strong carbide elements such as Nb, Ti, and V were added to form stable precipitates. The existence of intercrystalline precipitates leads to pinning and zigzag of grain boundaries, hinders the propagation of cracks, and enhances the low temperature strength and impact toughness of the materials. The No. 1 anddoi:10.2478/msp-2022-0007 fatcat:lo67quxdtzcqbmoav2vuemcqdu