本发明涉及金属材料及其制备技术领域,具体涉及一种双异构高强高塑高熵合金及其制备方法,通过成分调控,获得Fe-(1.4)Co-(0.6)NiMn-(0.1)C-(0.1)Al-x(0.3≤x≤0.6)高熵合金,对此成分进行熔炼及凝固,获得“κ′相和B2相”两种析出相的异构,通过热机械处理获得“变形组织与再结晶组织”的组织异构,该合金的拉伸屈服强度超过1.5GPa,抗拉强度超过1.6Gpa,延伸率接近21％,远超目前高熵合金强塑性；此外,本发明制备技术工艺简单,操作方便,制备出的合金力学性能优异,适于推广和应用。

The invention relates to the technical field of metal material and its preparation, in particular to a biisomic high-strength, high-plastic and high-entropy alloy and a preparation method thereof. Fe-(1.4)Co-(0.6)NiMn-(0.1)C-(0.1)Al-x(0.3≤x≤0.6) high-entropy alloy is obtained through composition regulation, and the composition is melted and solidified to obtain "κ" The isomerization of the two precipitates of 'phase and B2 phase is obtained by thermomechanical treatment. The tensile yield strength of the alloy exceeds 1.5GPa, the tensile strength exceeds 1.6Gpa, and the elongation is close to 21%, which is far higher than the strong plasticity of the current high-entropy alloy. In addition, the preparation technology of the invention has the advantages of simple process, convenient operation, excellent mechanical properties of the prepared alloy, and is suitable for popularization and application.