fcc高熵合金凭借良好的综合力学性能等特点受到广泛关注。但由于其屈服强度较低，亟待开发具有高屈服和抗拉强度的fcc结构高熵合金。本工作系统研究了Fe₅₀Mn₂₉Co₁₀Cr₁₀Cu₁高熵合金经3种温度(-196、25和300 ℃)轧制和退火处理(500和800 ℃)后的微观组织特征和拉伸力学性能，分析了不同加工工艺制备合金的变形机制及其对材料宏观力学性能的影响。结果表明，在单轴拉伸变形中，液氮温度与室温轧制生成的形变孪晶和板条结构的逆相变奥氏体对位错有一定阻碍作用，提高了材料的屈服强度。由温轧结合退火制备的材料中仅存在少量形变孪晶，位错滑移和堆垛层错是其主要变形机制。液氮轧制结合500 ℃退火制备的材料虽然具备较高的屈服强度，但塑性差。经室温和300 ℃轧制并结合500 ℃退火制备的材料则表现出较高的屈服强度与一定的加工硬化能力，2者的屈服强度分别为752和604 MPa，抗拉强度分别为917和784 MPa，均匀延伸率分别为11.2%和26.2%。经不同温度轧制结合退火得到的合金微观组织不同，导致其在后续拉伸变形过程中的力学行为存在显著差异。

Face-centered-cubic high-entropy alloys have attracted extensive attention due to their comprehensive mechanical and other properties. However, these alloys suffer from low yield strength, making it imperative to develop alloys with high yield and tensile strengths. This study systematically investigates the microstructural characteristics and tensile mechanical properties of the Fe₅₀Mn₂₉-Co₁₀Cr₁₀Cu₁ high-entropy alloy processed by rolling at three temperatures (-196, 25, and 300 °C) followed by annealing. The aim is to elucidate the deformation mechanisms associated with different processing routes and their influences on strength and ductility. During uniaxial tensile deformation, deformation twins produced by liquid-nitrogen and room-temperature rolling along with lath-like reversed austenite impede dislocation slip, thereby improving the yield strength of the alloy. In contrast, the alloy processed by warm rolling and annealing shows few deformation twins, with dislocation slip and stacking faults dominating as the deformation mechanisms. The alloy processed by liquid-nitrogen rolling followed by 500 ^oC annealing exhibits high yield strength but poor plasticity. Conversely, alloys rolled at room temperature and 300 ^oC followed by 500 ^oC annealing demonstrate higher yield strengths and certain degree of work hardening capability, showing corresponding yield strengths of 752 and 604 MPa, tensile strengths of 917 and 784 MPa, and uniform elongations of 11.2% and 26.2%. The differing microstructures resulting from processing at varied temperatures and subsequent annealing lead to significant differences in mechanical behavior under tensile testing.