CrFeNiAlSiB_(0.1)Ti_(x)高熵合金组织与性能研究  

Microstructure and Properties of CrFeNiAlSiB_(0.1)Ti_(x )High Entropy Alloy

作　　者：李刚[1,2] 于中民 温影 张东博 孟雨菲 Li Gang;Yu Zhongmin;Wen Ying;Zhang Dongbo;Meng Yufei(College of Materials Science&Engineering,Liaoning Technical University,Fuxin,Liaoning 123000,China;College of Materials Science&Engineering,Yingkou Institute of Technology,Yingkou,Liaoning 115000,China)

机构地区：[1]辽宁工程技术大学材料科学与工程学院,辽宁阜新123000 [2]营口理工学院材料科学与工程学院,辽宁营口115000

出　　处：《应用激光》2022年第8期88-94,共7页Applied Laser

基　　金：辽宁省教育厅科技研究项目资助(LJKZ1195);营口理工学院创新团队支持计划资助(TD202001)、营口理工学院高层次人才科研启动项目资助(YJRC202014);2021营口市企业博士双创项目资助(QB-2021-01)。

摘　　要：采用激光烧结技术制备CrFeNiAlSiB_(0.1)Ti_(x)高熵合金(x=0.1、0.3、0.5)。利用XRD、OM、SEM和EDS、维氏显微硬度计、电化学工作站进行表征,分析物相结构、显微组织、硬度及耐蚀性能。结果表明:CrFeNiAlSiB0.1Tix高熵合金均含有有序BCC相和Cr_(3)Si相,掺杂Ti元素后,出现Ti_(5)Si_(4)相。合金由枝晶和枝晶间组织构成,枝晶多为树枝状与花瓣状。CrFeNiAlSiB_(0.1)合金枝晶臂中铬与硅元素富集,为Cr_(3)Si相,枝晶间为BCC相富铝、镍元素。CrFeNiAlSiB_(0.1)Ti_(0.5)合金中Cr_(3)Si相与Ti_(5)Si_(4)相均分布在枝晶臂。CrFeNiAlSiB_(0.1)Ti_(0.5)合金显微硬度达到最大值,为1 067 HV,此时合金的耐磨性能最佳,为46.56 mg·cm^(-2)。在1 mol/L的H_(2)SO_(4)溶液与1 mol/L的NaOH溶液中,CrFeNiAlSiB_(0.1)Ti_(0.5)合金具有相对较低的自腐蚀电流密度,分别为104.32μA·cm^(-2)、86.41μA·cm^(-2)。CrFeNiAlSiB_(0.1)Ti_(x)(x=0.1,0.3,0.5) high entropy alloys were prepared by laser sintering. XRD、 OM、SEM and EDS, Vickers microhardness tester and electrochemical workstation were used to characterize the phase structure, microstructure, hardness and corrosion resistance of the analytes. The results showed that CrFeNiAlSiB_(0.1)Ti_(x) high entropy alloys contain ordered BCC phase and Cr_(3)Si phase, and Ti_(5)Si_(4) phase appears after doping Ti element. The alloys are composed of dendrites and interdendrite structures, most of which are dendritic and petal-like. Cr and Si elements are enriched in the dendrite arm of CrFeNiAlSiB_(0.1) alloy, which is Cr_(3)Si phase, and Al and Ni elements are enriched in the interdendrite of BCC phase. The Cr_(3)Si phase and Ti_(5)Si_(4) phase in CrFeNiAlSiB_(0.1)Ti_(0.5) alloy are distributed in dendrite arm. The microhardness of CrFeNiAlSiB_(0.1)Ti_(0.5) alloy reaches the maximum of 1 067 HV, and the wear resistance of CrFeNiAlSiB_(0.1)Ti_(0.5) alloy is the best, which is 46.56 mg·cm^(-2). In 1 mol/L H_(2)SO_(4) solution and 1 mol/L NaOH solution, CrFeNiAlSiB_(0.1)Ti_(0.5) alloy has relatively low self-corrosion current densities, which are 104.32 μA·cm^(-2) and 86.41 μA·cm^(-2), respectively.

关 键 词：激光烧结 高熵合金 硬度 耐蚀性 

分 类 号：TG113[金属学及工艺—物理冶金] TG115[金属学及工艺—金属学]