摘要
航空材料要求具有较高的强度、低的密度、优良的耐腐蚀及抗疲劳等性能,发动机材料更需要耐高温性能。含有高熔点难熔金属元素的高熵合金(high entropy alloys,HEAs)在高温环境下显示出了优异的材料性能。目前,共有120余种难熔高熵(refractory high entropy alloys,RHEAs)被合成,并对其物理和力学特性如密度、拉伸性能、压缩性能、弹性模量和抗氧化性等进行了实验测试。本文对RHEAs和传统典型航空材料的性能参数进行了总结,绘制了高温情况下的密度、屈服强度极限的对比图表,多数RHEAs显示出较高的力学强度和组织稳定性。
High strength and low density are the basic requirements for the materials used in the aeronautical field,the engine materials need high temperatures resistance more severely.High entropy alloys(HEAs)containing refractory metal elements with high melting point show excellent material properties at high temperature.At present,more than 120 kinds of refractory high entropy alloys(RHEAs)have been synthesized,and their physical and mechanical properties,such as density,tensile properties,compression properties,elastic modulus and antioxidant properties have been tested experimentally.In this paper,the performance parameters of refractory high entropy alloys and traditional typical aviation materials are summarized,and the density and yield strength limits of refractory high entropy alloys at high temperature are compared,most refractory high entropy alloys show high mechanical strength and microstructure stability.
作者
魏耀光
郭刚
李静
曾一畔
何婧
WEI Yaoguang;GUO Gang;LI Jing;ZENG Yipan;HE Jing(AVIC Chengdu Aircraft Industrial Corporation,Chengdu 610091,China)
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2019年第5期82-93,共12页
Journal of Aeronautical Materials
关键词
航空材料
难熔高熵合金
密度
屈服强度
高温
aeronautical materials
refractory high entropy alloys
density
high yield strength
high-temperature application
