Abstract:Laser melting deposition (LMD) was used to stimulate the columnar to equiaxed transition (CET) of Ti6Al4V grains by adding a few of nano-B4C particles. The results showed that the grains were gradually refined with the increase of B4C content. When the B4C content is 3 wt-%, the titanium matrix composite material of B4C and Ti6Al4V reached CET. Ti6Al4V and B4C happened in-situ reaction to form TiB and TiC reinforcements at high temperature, which not only precipitate at grain boundaries to limit grain growth b… Show more
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