A TiAl based alloy with excellent mechanical performance prepared by gas atomization and spark plasma sintering

Ti-46.15Al-1.87Cr-2.1Nb-(B, Si, Y) alloying powders were fabricated by gas atomization process and then consolidated by spark plasma sintering (SPS). The SPSed TiAl alloy exhibited finer grain microstructure and enhanced mechanical properties than as-cast alloy. The results indicate that TiAl alloys fabricated by the SPS process could open possibilities of application as structural materials offering fine microstructure and excellent properties.

► A TiAl based alloy was successfully fabricated by spark plasma sintering (SPS).
► The sintering temperature exerts a crucial role on the structure of SPSed samples.
► The SPSed TiAl alloy samples exhibit enhanced strength than as-cast TiAl alloy.