高温变形对Al_(0.1)(MoNbTa_(0.7)ZrTi)难熔高熵合金微观组织的影响  

Effects of High Temperature Deformation on Microstructure of Al_(0.1)(MoNbTa_(0.7)ZrTi)Refractory High Entropy Alloy

作　　者：董福宇[1] 关金源 张悦[1] 申向阳 郭子鹤 黄宏军[1] 袁晓光[1] Dong Fuyu;Guan Jinyuan;Zhang Yue;Shen Xiangyang;Guo Zihe;Huang Hongjun;Yuan Xiaoguang(School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870)

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110870

出　　处：《特种铸造及有色合金》2024年第3期294-298,共5页Special Casting & Nonferrous Alloys

基　　金：辽宁省自然科学基金资助项目(2023JH2/101700276)。

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Al_(0.1)(MoNbTa_(0.7)ZrTi)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Al_(0.1)(MoNbTa_(0.7)ZrTi)难熔高熵合金微观组织的影响。结果表明,高温变形后,Al_(0.1)(MoNbTa_(0.7)ZrTi)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。In order to solve the problem of rough dendritic and element segregation in as-cast refractory high entropy alloys,Al_(0.1)(MoNbTa_(0.7)ZrTi)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 Al_(0.1)(MoNbTa_(0.7)ZrTi)refractory high entropy alloy was explored.The results indicate that Al_(0.1)(MoNbTa_(0.7)ZrTi)refractory high entropy alloy retains a body-centered cubic two-phase solid solution structure without phase composition transformation 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 

分 类 号：TG146.4[一般工业技术—材料科学与工程] TG132.32[金属学及工艺—金属材料]