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基于CoCrCu_(0.5)FeNi高熵合金塑性好但强度低的特点,在其中加入少量的B元素,制备了CoCrCu_(0.5)FeNiB_x(x=0.1,0.2,0.3,0.5)高熵合金,以研究B的加入对微观组织、相结构以及力学性能的影响。研究表明,CoCrCu_(0.5)FeNiB_x(x=0.1,0.2)高熵合金的组织主要由枝晶,枝晶间珊瑚状组织组成,当x≥0.3时,合金凝固前发生了液相分离,组织中出现了富Cu球状组织。CoCrCu_(0.5)FeNiB_x高熵合金的相结构主要由面心立方相和正交晶系相组成。CoCrCu_(0.5)FeNiB_(0.2)合金具有较佳的强度和塑性配合,其压缩强度和塑性分别为1400MPa和16%。
Based on the good plasticity but low strength of CoCrCu_ (0.5) FeNi high entropy alloy, a small amount of B element was added into it to prepare high entropy alloy CoCrCu_ (0.5) FeNiB_x (x = 0.1,0.2,0.3,0.5) The effect of adding on the microstructure, phase structure and mechanical properties. The results show that the microstructure of CoCrCu_ (0.5) FeNiB_x (x = 0.1,0.2) high entropy alloy mainly consists of coral and dendrites. When x≥0.3, liquid phase separation occurs before solidification, The rich Cu ball organization. The phase structure of CoCrCu_ (0.5) FeNiB_x high-entropy alloys mainly consists of face-centered cubic phase and orthorhombic phase. CoCrCu_ (0.5) FeNiB_ (0.2) alloy has better strength and ductility, and its compressive strength and ductility are 1400MPa and 16% respectively.