On the state of boride precipitates in grain refined TiAl-based alloys with high Nb content

The work is aimed at the refinement of primary microstructure appearing in the refractory lightweight structural TiAl-based intermetallics during their solidification from the melt. The green alloy with Ti–46Al–8Nb (at.%) nominal composition is selected for applied study in microstructure engineering. For grain refining, the metallurgical alloying of the material was performed with microcrystalline titanium diboride TiB2 additive, along with...