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In the present research, microstructure refinement of a high-Nb TiAl alloy (Ti-48Al-8Nb-0.15B ) was\udrealized by means of the electromagnetic continuous casting (EMCC) technique. The microstructure of an ingot\udobtained by EMCC was analyzed using scanning electron microscopy (SEM). As compared with the raw as-cast\udalloy, the obtained EMCC alloy presented a much finer microstructure with lamellar colonies with a mean size of\udabout 50-70 μm because the electromagnetic stirring broke initial dendrites and enhanced the heterogeneous\udnucleation. As the grains were refined, the properties of the TiAl alloy were improved significantly. This implies that\udthe EMCC technique could offer the possibility of application for high-Nb TiAl alloys with a refined microstructure and\udexcellent properties to be used as a structural material

A high-Nb TiAl alloy with highly refined microstructure and excellent mechanical properties fabricated by electromagnetic continuous casting