  With important application prospects, eutectic high entropy alloys have
received extensive attention for their excellent strength and ductility in a
large temperature range. The excellent casting characteristics of eutectic high
entropy alloys make it possible to achieve well manufacturability of selective
laser melting. For the first time, we have achieved crack-free eutectic high
entropy alloy fabricated by selective laser melting, which has excellent
mechanical properties in a wide temperature range of -196 degrees Celsius~760
degrees Celsius due to ultra-fine eutectic lamellar spacing of 150 ~ 200nm and
lamellar colony of 2 ~ 6 {\mu}m. Specifically, the room temperature tensile
strength exceeds 1400MPa and the elongation is more than 20%, significantly
improved compared with those manufactured by other techniques with lower
cooling rate.
