The project is devoted to studying the alloy development and mechanical property of high-entropy alloys. High-entropy alloys (HEAs), or multi-component alloys with equiatomic or close-to-equiatomic compositions, emerge as novel metallic materials with great potential to be used as high temperature materials, or coating materials requiring high hardness and high wear resistance. The mechanical behaviour of HEAs are greatly affected by the phase constitutions in that generally fcc-typed HEAs are ductile but soft, while the bcc-typed HEAs are hard but brittle. How to simultaneously achieve both high strength and high tensile ductility in HEAs is a great challenge in the field, and this constitutes the target of this job. The job mainly involves alloy development and thermomechanical treatments, to tune the phase constitution and the microstructure, aiming at obtaining novel HEAs with balanced strength and tensile ductility. Mechanical testing, at both room temperature and elevated temperatures, will be carried out to examine the mechanical properties of the developed materials.