Al合金化对CoFeNiV基高熵合金微观组织和力学性能的影响  

Effect of Al Alloying on Microstructure and Mechanical Propertiesof CoFeNiV-based High-Entropy Alloys

作　　者：冯正中 王璐 杨林 FENGZhengzhong;WANGLu;YANGLin(School of Mechanical Engineering,Jiangsu University of Technology,Changzhou 213001,China)

机构地区：[1]江苏理工学院机械工程学院,江苏常州213001

出　　处：《热加工工艺》2025年第7期75-79,共5页Hot Working Technology

基　　金：江苏省(校)研究生实践创新计划项目(XSJCX22_03);常州市科技项目应用基础研究计划(CJ20220057)。

摘　　要：采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、电子背散射衍射(EBSD)和万能试验机等,研究了不同Al含量对CoFeNiVAl_(x)(x=0~1)高熵合金微观组织与力学性能的影响。结果表明:Al元素的添加促进BCC相的形成,CoFeNiVAl_(x)显微组织由柱状晶转变为等轴晶。BCC+FCC双相结构使得合金屈服强度提升的同时保留了良好的塑性。其中,CoFeNiVAl_(0.5)合金拥有1272 MPa的高屈服强度和32%的塑性应变。The effect of different Al content on the microstructure and mechanical properties of the CoFeNiVAl_(x)(x=0-1)high-entropy alloys was studied by X-ray diffractometer(XRD),scanning electron microscope(SEM),electron back-scattered diffraction(EBSD)and universal testing machine,etc.The results show that the addition of Al element promotes the formation of BCC phase,and the microstructure changes from columnar grains to equiaxed grains.The FCC+BCC two-phase structure greatly improves the yield strength of the alloy and retains excellent plasticity at the same time.Among them,CoFeNiVAl0.5 alloy possesses a high yield strength of 1272 MPa and a plastic strain of 32%.

关 键 词：高熵合金 相结构 微观组织 力学性能 

分 类 号：TG132[一般工业技术—材料科学与工程]