碳元素对L12型高熵化合物合金组织及性能的影响
Effects on the Microstructure and Mechanical Properties of a L12-Type High-Entropy Intermetallic Alloy Dopped with Carbon
祖润锋 1杜兴蒿 1袁帅 1杨明澄 1段国升 1武保林 1张利1
作者信息
- 1. 沈阳航空航天大学材料科学与工程学院,沈阳 110000
- 折叠
摘要
在外加载荷作用下,L12型有序化合物合金易出现晶界脆性断裂,严重制约了其实用化进程.研究了碳元素对(Ni,Co,Fe)3(Al,Ti,Fe)型有序高熵化合物合金的组织以及性能的影响.结果表明:经室温变形以及高温退火处理后,含碳合金具有不完全再结晶组织,并且在晶界处存在无序面心立方结构的纳米过渡层.该含碳合金在室温下屈服强度达到1 015 MPa,拉伸延伸率达到16％;在760 ℃条件下屈服强度达到900 MPa,拉伸延伸率达到10％.说明碳的加入有助于L12型化合物合金克服晶界脆性,获得良好的综合力学性能.
Abstract
It is known that L12-type ordered intermetallic alloys are generally susceptible to brittle fracture at grain boundaries under the loading conditions,which seriously limits their practical usability.In this paper,the effects of doping Con the microstructure and mechanical properties of(Ni,Co,Fe)3(Al,Ti,Fe)high-entropy intermetallic alloys have been investigated.After deforming at room temperature and annealing at elevated temperature,the C-dopped alloy displayed a non-fully recrystallized structure in which disordered face-centered cubic structure(fcc)nanolayers can be observed at the grain boundaries.The C-dopped alloy displayed yield tensile strength of 1 015 MPa,900 MPa combined with a tensile elongation of 16％,10％at room temperature and 760 ℃,respectively.These results have affirmed that the doping of C is conducive to overcome the intergranular embrittlement of L12-type ordered intermetallic alloys,so as to achieve excellent comprehensive mechanical properties.
关键词
高熵化合物合金/C合金化/力学性能/不完全再结晶Key words
high-entropy intermetallic alloys/C micro-alloying/mechanical properties/non-fully recrystallization引用本文复制引用
基金项目
辽宁省科技厅军民融合重点项目(2020JH2/107)
出版年
2024
NETL
NSTL
万方数据