论文部分内容阅读
采用真空电弧炉制备了CoCrFeMnNiCu_x高熵合金,研究了不同Cu含量对该体系高熵合金的微观组织及力学性能的影响。结果表明,高熵合金的微观组织为树枝晶,合金的枝晶富含Co、Cr、Fe,而枝晶间富含Ni、Mn。Cu易偏析于枝晶间,添加Cu并没有使合金晶体结构发生改变,仍为FCC结构。随着Cu含量的增加,合金的抗压强度及显微硬度先增大后减小,但增减幅度很小。当x=0.8时,合金的抗压强度和硬度达到最大值。含Cu的6组元高熵合金的抗压强度及显微硬度明显高于不含Cu的5组元高熵合金。
The CoCrFeMnNiCu_x high entropy alloy was prepared by vacuum arc furnace and the effect of different Cu content on the microstructure and mechanical properties of the high entropy alloy was studied. The results show that the microstructure of high-entropy alloy is dendrite. The dendrites of the high-entropy alloy are rich in Co, Cr and Fe, while the dendrites are rich in Ni and Mn. Cu tends to segregate between the dendrites, adding Cu does not change the crystal structure of the alloy, and is still an FCC structure. With the increase of Cu content, compressive strength and microhardness of the alloy first increased and then decreased, but the increase and decrease was small. When x = 0.8, the compressive strength and hardness of the alloy reach the maximum. The compressive strength and microhardness of 6-component high-entropy alloy containing Cu are obviously higher than those of 5-component high-entropy alloy containing no Cu.