摘要
为了实现高熵合金的大规模工业应用价值,降低高熵合金的成本,文中基于CoCrFeMnNi等原子比高熵合金,剔除昂贵的元素Co,降低Cr和Ni元素的原子百分比(y/%)含量,设计了一种新的低成本的非等原子比FCC结构高熵合金Fe40Mn40Ni10Cr10。同时添加不同含量的C原子,研究C对Fe40Mn40Ni10Cr10高熵合金组织及性能的影响。研究结果表明:Fe40Mn40Ni10Cr10高熵合金为单一的FCC结构固溶体。当加入y=2%碳元素后,合金仍为FCC单相固溶体结构;当碳元素含量增大至y=4%,在晶界处出现了少量的碳化物。碳元素通过固溶强化以及第二相碳化物的强化作用提高了合金的硬度和强度,降低了合金的延伸率。
The study aims to reduce the cost of high entropy alloys(HEA)and put them into large-scale industrial use.Based on the equiatomic CoCrFeMnNi HEA,a new low-cost non-equiatomic HEA Fe40Mn40Ni10Cr10 was designed in which the expensive element Co was removed and the contents of elements Cr and Ni were reduced.The effect of different contents of carbon on the microstructure and properties of Fe40Mn40Ni10Cr10 HEA was studied.The results show that Fe40Mn40Ni10Cr10 HEA is a solid solution with a single FCC structure.With 2%carbon added to it,the alloy is still a FCC solid solution.When the content of carbon increases to 4%,a small amount of carbide appears at the grain boundary.Carbon enhances the hardness and strength of the alloy and reduces elongation of the alloy through solid solution strengthening and the second phase strengthening of carbide.
作者
白莉
李小阳
李谋
吕煜坤
BAI Li;LI Xiaoyang;LI Mou;LYU Yukun(School of Materials and Chemical Engineering,Xi’an Technological University,Xi’an 710021,China)
出处
《西安工业大学学报》
CAS
2020年第5期518-523,共6页
Journal of Xi’an Technological University
基金
陕西省科技厅基础研究计划项目(2019JQ-421)。
关键词
高熵合金
固溶强化
碳化物
力学性能
high-entropy alloy
solution strengthening
carbide
mechanical properties
