高温变形对Al0.1(MoNbTa0.7ZrTi)难熔高熵合金微观组织的影响
Effects of High Temperature Deformation on Microstructure of Al0.1(MoNbTa0.7ZrTi)Refractory High Entropy Alloy
董福宇 1关金源 1张悦 1申向阳 1郭子鹤 1黄宏军 1袁晓光1
作者信息
- 1. 沈阳工业大学材料科学与工程学院,沈阳 110870
- 折叠
摘要
为了解决铸态难熔高熵合金中枝晶粗大及元素偏析问题,通过非自耗真空电弧熔炼炉制备出Al0.1(MoNbTa0.7ZrTi)难熔高熵合金,在Gleeble-3500试验热模拟机上进行了不同温度的单轴高温压缩试验,探索了变形温度对Al0.1(MoNbTa0.7ZrTi)难熔高熵合金微观组织的影响.结果表明,高温变形后,Al0.1(MoNbTa0.7ZrTi)难熔高熵合金仍为体心立方双相固溶体结构,并未改变其相组成.元素偏析现象随着变形温度的升高而逐渐减弱,同时合金组织变均匀,枝晶晶粒尺寸变小.
Abstract
In order to solve the problem of rough dendritic and element segregation in as-cast refractory high entropy alloys,Al0.1(MoNbTa0.7ZrTi)refractory high entropy alloy was fabricated through a non-self-consumption vacuum arc smelting furnace,and uniaxial high-temperature compression test was carried out on the Gleeble-3500 test thermal simulator under different temperatures.The influence of deformation temperatures on microstructure of Al0.1(MoNb-Ta0.7ZrTi)refractory high entropy alloy was explored.The results indicate that Al0.1(MoNbTa0.7ZrTi)refractory high entropy alloy retains a body-centered cubic two-phase solid solution structure without phase composition transforma-tion after high-temperature deformation.The phenomenon of elemental segregation is gradually weakened with the increase of deformation temperature.Meanwhile,the morphology becomes uniform and the size of the dendrite grain is refined.
关键词
难熔高熵合金/高温变形/体心立方结构/枝晶/偏析Key words
RHEA/High Temperature Deformation/Body-centered Cubic Structure/Dendrite/Segregation引用本文复制引用
基金项目
辽宁省自然科学基金资助项目(2023JH2/101700276)
出版年
2024
NETL
NSTL
万方数据