State Key Laboratory of Solidification Processing;
Northwestern Polytechnical University;
Xi’an 710072;
China;
Langu Institute for Materials Analysis Co.Ltd;
Weihai 264207;
China;
Institute of optics and electronics;
Chinese Academy of Sciences;
Chengdu 610200;
China;
Dual heterogeneous structures; Medium-entropy alloy; Co-free; Strength-ductility synergy properties;