Abstract Tensile creep tests were performed on a CrMnFeCoNi high-entropy alloy at temperatures from 1023 K to 1173 K. A uniform stress exponent 3.7 ± 0.1 was found across all temperatures. The apparent activation energies of creep under various applied stresses were determined to be around 230 kJ/mol and decrease with increasing stress, indicating a stress-assisted, thermally activated behavior. Steady-state creep microstructures feature no subgrain formation and high dislocation density within grains. Based on our results, the creep rate of CrMnFeCoNi is believed to be controlled by both dislocation-dislocation interactions and dislocation-lattice interactions.

中文翻译：

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CrMnFeCoNi高熵合金的拉伸蠕变性能

摘要 在 1023 K 至 1173 K 的温度下对 CrMnFeCoNi 高熵合金进行了拉伸蠕变试验。在所有温度下发现均匀应力指数为 3.7 ± 0.1。在各种外加应力下蠕变的表观活化能被确定为大约 230 kJ/mol 并且随着应力的增加而降低，表明应力辅助的热活化行为。稳态蠕变微观结构具有无亚晶形成和晶粒内高位错密度的特点。根据我们的结果，CrMnFeCoNi 的蠕变速率被认为受位错-位错相互作用和位错-晶格相互作用控制。