Tuning mechanical properties of high entropy alloys by electro-pulsing method

•Mechanical properties of high-entropy alloys (HEAs) can be tuned by the electro-pulsing treatment (EPT).•130 V- and 150 V-(Co40Fe25Cr20Ni15)95Al5 exhibit ultimate tensile strength of 0.96 and 0.78 GPa, ductility of 16.5 and 49.2%.•High Hall-Petch coefficient KH (Kσy) value of 189.7 HV·μm0.5 (410.51 MPa·μm0.5) for (Co40Fe25Cr20Ni15)95Al5 HEA.•Dynamic Hall-Petch relationship of deformation twin is partly responsible for mechanical properties of 130 V and 150 V samples.