CoCrNi-based multi-principal element alloys (MPEAs) often lack strength at elevated temperatures. Here

to overcome this deficiency

a novel oxide-dispersion strengthening (ODS) CoCrNi-based MPEA was designed by incorporating nano-scale yttria via LPBF. The ODS MPEA possesses superior strength-ductility synergy at both ambient and elevated temperatures to most reported CoCrNi-based MPEAs and state-of-the-art superalloys. TEM investigations revealed dislocation forest and slip traces in the interior of solidification dislocation cell structure

along with extended stacking faults and nano-twins. These features contributed to the excellent strength-ductility of the MPEA. Lastly

quantitative analyses uncovered the contributions of operating strengthening mechanisms to its high strength.