ABSTRACT XRD results show that diffraction peak of M3B is gradually apparent with the increase of annealing temperature and time, which indicates that annealing can promote the formation of M3B phase. The increase of annealing temperature and time leads to transformation of inter dendritic microstructure from long strip Cr3B phase to granular Cr3B phase. Particularly, after annealing at 1100oC for 20 h, the particles of Cr3B phase are distributed homogeneously in the matrix FCC phase, but the number of Cr3B phase decreases evidently. After annealing at 1100oC for 20 h, the yield strength and tensile strength of the alloy become 412 MPa and 797 MPa, having increments of 64.1% and 70.7%, respectively, compared to the as-cast alloys. However, the elongation remains the same as the cast alloy. After annealing, the particles of Cr3B phase are uniformly distributed in the FCC matrix and some B elements are dissolved into dendritic structure which results in significant increase of strength in the form of dispersion strengthening and solution strengthening. TEM images of the samples depict that after annealing certain deformation twins are observed, which lead to the maintenance of plasticity. GRAPHICAL ABSTRACT

中文翻译：

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CoCrFeMnNiB0.1高熵合金退火设计提高力学性能

摘要 XRD结果表明，随着退火温度和时间的增加，M3B的衍射峰逐渐明显，表明退火可以促进M3B相的形成。退火温度和时间的增加导致枝晶间组织从长条状 Cr3B 相转变为粒状 Cr3B 相。特别是在 1100oC 退火 20 h 后，Cr3B 相颗粒均匀分布在基体 FCC 相中，但 Cr3B 相的数量明显减少。在 1100oC 下退火 20 h 后，合金的屈服强度和抗拉强度分别为 412 MPa 和 797 MPa，与铸态合金相比分别增加了 64.1% 和 70.7%。然而，伸长率保持与铸造合金相同。退火后，Cr3B相颗粒均匀分布在FCC基体中，部分B元素溶解成树枝状结构，使强度以弥散强化和固溶强化的形式显着提高。样品的 TEM 图像描述了在退火后观察到某些变形孪晶，这导致塑性保持。图形概要