Though extensive studies have been performed on high entropy alloys, there is still a lack of understanding of their high-temperature deformation mechanisms. By systematically analyzing the high-temperature behavior of fine-grained and coarse-grained CoCrFeMnNi and Al_0.5CoCrFeMnNi high-entropy alloys (HEAs) studied in this work and reported in the literature, their constitutive deformation equations for dislocation climb creep, grain boundary sliding, and solute drag creep were determined. Based on the identified deformation mechanism equations, deformation mechanism maps and processing maps for CoCrFeMnNi and Al_0.5CoCrFeMnNi alloys could be calculated and constructed. Ultimately, the processing maps could be combined with deformation mechanism maps in 2D or 3D. The proposed maps will be useful in predicting the optimum hot working conditions at various grain sizes and in different operating temperature and strain-rate ranges as well as identifying the deformation mechanisms at the corresponding conditions. The same approaches can be used for calculating the deformation mechanism and processing maps for other HEAs with different crystal structure and compositions.

尽管已经对高熵合金进行了广泛的研究，但是仍然缺乏对它们的高温变形机理的理解。通过系统分析本文研究和文献报道的细晶粒和粗晶粒CoCrFeMnNi和Al _0.5 CoCrFeMnNi高熵合金（HEA）的高温行为，它们的位错爬升蠕变，晶界滑动的本构变形方程式，并确定了溶质的蠕变蠕变。根据识别出的变形机理方程，得出CoCrFeMnNi和Al _0.5的变形机理图和加工图可以计算和构造CoCrFeMnNi合金。最终，处理图可以与2D或3D中的变形机制图结合。拟议的地图将有助于预测各种晶粒尺寸，不同工作温度和应变率范围内的最佳热加工条件，以及确定相应条件下的变形机理。可以使用相同的方法来计算其他具有不同晶体结构和组成的HEA的变形机理和加工图。