School of Materials Science and Engineering;
Harbin Institute of Technology;
Harbin 150001;
China;
National Key Laboratory for Precision Hot Processing of Metals;
Harbin Institute of Technology;
Harbin 150001;
China;
Center of Analysis and Measurement and Computing;
Harbin Institute of Technology;
Harbin 150001;
China;
Medium entropy alloy; Laser remelting; Microstructure; Nano-indentation; Strengthening mechanism;