摘要
通过真空电弧熔炼成功制备了Fe 40 Mn 30 Ni 10 Cr 10 Al 10高熵合金,并添加5%(原子分数)的碳元素,研究了碳元素对该高熵合金的相结构、微观组织以及力学性能的影响。研究发现,Fe 40 Mn 30 Ni 10 Cr 10 Al 10高熵合金由FCC相和BCC相条状交错组成,并且BCC相区存在大量的纳米B2相。加入5%(原子分数)的碳元素后,合金中的BCC相和纳米B2相转变为FCC相,同时在晶界处产生大量的碳化物M 7C 3。由于碳原子的加入,合金的平均延伸率由18%提高到26%,而合金的抗拉强度变化不大,保持在730 MPa左右。
Fe 40 Mn 30 Ni 10 Cr 10 Al 10 high-entropy alloy was successfully prepared by vacuum arc melting,and 5at%carbon was added.The effect of carbon on phase constituents,microstructure and mechanical properties of the Fe 40 Mn 30 Ni 10 Cr 10 Al 10 high-entropy alloy was studied systematically.It was found that Fe 40 Mn 30 Ni 10 Cr 10 Al 10 high-entropy alloy was composed of FCC phase,BCC phase and B2 nano-particles,and B2 nano-particles embedded in BCC phase.Addition 5at%carbon to Fe 40 Mn 30 Ni 10 Cr 10 Al 10 high-entropy alloy,BCC phase and B2 nano-particles transformed into FCC phase,and a large amount of M 7C 3 carbide appeared along grain boundaries.Due to the addition of carbon,the elongation of the alloys increased from 18%to 26%,while the tensile strength of the alloy changed little,which was kept at about 730 MPa.
作者
白莉
王宇哲
吕煜坤
颜屹
付梅文
BAI Li;WANG Yuzhe;LYU Yukun;YAN Yi;FU Meiwen(School of Materials and Chemical Engineering,Xi'an Technological University,Xi'an 710021,China;School of Intelligent Manufacturing,Nanyang Institute of Technology,Nanyang 473004,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2020年第17期17072-17076,共5页
Materials Reports
基金
国家自然科学基金青年基金(51901167)
陕西省科技厅基础研究计划项目(2019JQ-421)。
关键词
高熵合金
碳原子
相组成
微观组织
力学性能
high-entropy alloy
carbon atom
phase constituents
microstructures
mechanical properties
