摘要
采用真空电弧熔炼技术制备了FeCrMnAl_(x)Cu_((2-x))(x=1.3,1.4,1.5,1.6,1.7)高熵合金,研究了Al、Cu含量对FeCrMnAl_(x)Cu_((2-x))高熵合金组织结构、力学性能和摩擦学性能的影响.结果表明:FeCrMnAl_(x)Cu_((2-x))高熵合金为BCC结构单相固溶体.组织均由树枝晶组成,随x的增加,屈服强度逐渐上升,在x=1.5时,达到最大值1092.31 MPa.抗压强度和变形率均随x的增加呈下降趋势,且在x=1.3时达到最大值,分别为1517.84 MPa和43.36%.FeCrMnAl_(1.7)Cu_(0.3)高熵合金显微硬度达到最大值559.9 HV.磨损率最小为4.70×10^(-6)mm^(3)N^(-1)m^(-1).随x的增大,合金磨损机制主要以磨粒磨损、粘着磨损、氧化磨损为主.
FeCrMnAl_(x)Cu_((2-x))(x=1.3,1.4,1.5,1.6,1.7)high-entropy alloys(HEAs)was prepared by vacuum arc melting technology,and the influence of Al and Cu on the microstructure,mechanical properties,and tribological behavior of FeCrMnAl_(x)Cu_((2-x))HEAs was investigated.The results revealed that FeCrMnAl_(x)Cu_((2-x))HEAs is BCC solid solution structure.The microstructure of the alloys consist of dendritic structure.With increasing x,the yield strength gradually increase and reach a maximum value of 1092.31 MPa at x=1.5.Both compressive strength and deformation rate exhibit a decreasing trend with increasing x,reaching their maximum values at x=1.3,which are 1517.84 MPa and 43.36%,respectively.The FeCrMnAl_(1.7)Cu_(0.3)HEA exhibit a maximum microhardness of 559.9 HV.The minimum wear rate is found to be 4.70×10^(-6)mm^(3)·N^(-1)·m^(-1).As x increased,the dominant wear mechanisms in the alloy are primarily abrasive wear,adhesive wear,and oxidative wear.
作者
李大鹏
邓国辉
吴志国
宣蕊
LI Da-peng;DENG Guo-hui;WU Zhi-guo;XUAN Rui(Technical Development Department of FAW-Volkswagen Automotive Co.Ltd,Jilin 130010,China;Gelinbei Science and Technology Development Co.Ltd.,Shanghai 201100,China)
出处
《兰州理工大学学报》
CAS
北大核心
2024年第4期6-11,共6页
Journal of Lanzhou University of Technology
关键词
真空电弧熔炼
高熵合金
微观组织
机械性能
vacuum arc melting
high-entropy alloys
microstructure
mechanical properties
