基于前期的研究结果，降低Mn和Cr元素的含量，将2者的原子分数均固定在8%，设计出(Fe_0.33Co_0.33Ni_0.33)_{84 - x} Cr₈Mn₈B _x (x = 10、11、13、15和18)合金(简称10B、11B、13B、15B和18B)，采用真空熔融甩带法制备出该系列合金的薄带。将合金薄带在不同温度下进行退火处理，通过XRD、DSC、TEM、SEM、万能拉伸试验机、OM、Vickers硬度计等研究了合金薄带的结构特征、晶化行为和力学性能。结果表明：11B合金薄带已完全形成非晶相(am)，11B~18B合金薄带加热时都有2个结晶转变放热峰，B元素的添加提高了该系列合金的非晶形成能力(GFA)和热稳定性。11B~18B合金薄带在不同温度退火，bcc相、fcc相和硼化物(M₂₃B₆)等1种或多种混合物析出，其结晶行为分别为：11B和13B，[am]→[am′ + bcc]→[am″ + bcc + fcc]→[bcc + fcc + M₂₃B₆]→[fcc + M₂₃B₆]；15B，[am]→[am′ + fcc + bcc]→[am″ + bcc + fcc + M₂₃B₆]→[bcc + fcc + M₂₃B₆]→[fcc + M₂₃B₆]；18B，[am]→[am′ + fcc]→[am″ + fcc + M₂₃B₆]→[fcc + M₂₃B₆] (其中，am′和am″分别为第1次和第2次结晶残余非晶相)。

The high-entropy-amorphous alloy (also called a pseudo-high-entropy alloy), as one of the categories of high-entropy alloys, is being developed as a new type of functional and structural high-strength material due to its advantages of high entropy and amorphousness. To further develop a new high-entropy-amorphous alloy, based on the results of previous studies, (Fe_0.33Co_0.33Ni_0.33)_{84 - x} Cr₈Mn₈B _x (x = 10-18, atomic fraction, %) alloys were synthesized (hereafter, alloys 10B, 11B, 13B, 15B, and 18B). The ribbons with a thickness of 20-30 μm and a width of about 1.5 mm were produced by single-roller melt-spinning. The alloy ribbons were annealed at different temperatures and then characterized by XRD, DSC, TEM, SEM, OM, universal tensile testing machine, and Vickers hardness tester. The results show that the addition of B improves the glass-forming ability and thermal stability of these alloys. The ribbons are fully amorphous at the low B content of 11%. Two exotherms were observed based on the DSC curves for the 11B-18B as-spun ribbons. The crystallization behaviors of 11B-18B alloy ribbons are as follows during heating: 11B and 13B, [am]→[am′ + bcc]→[am″ + bcc + fcc]→[bcc + fcc + M₂₃B₆]→[fcc + M₂₃B₆]; 15B, [am]→[am′ + fcc + bcc]→[am″ + bcc + fcc + M₂₃B₆]→[bcc + fcc + M₂₃B₆]→[fcc+ M₂₃B₆]; and 18B, [am]→[am′ + fcc]→[am″ + fcc + M₂₃B₆]→[fcc + M₂₃B₆] (The am′ and am″ are the residual amorphous phases after the first and the second exotherms, respectively)