元素Cu对Cu_xAlFeNiCrTi(x=0,0.5,1.0)高熵合金组织性能的影响

高熵合金具有许多优异性能,目前对其研究还不够深入。利用真空电弧熔炼炉制备了Cu_xAlFeNiCrTi(x=0,0.5,1.0)高熵合金,并通过X射线衍射仪(XRD)、扫描电镜(SEM)、显微硬度计和磨损试验对该高熵合金的微观组织及其性能进行了一系列测试,探究不同含量的Cu元素对合金性能的影响。结果表明:合金组织为树枝晶,主要是由体心立方(BCC)相和面心立方(FCC)相组成;随着Cu元素含量的增加,FCC相含量也在增加,合金的硬度降低;随Cu元素含量的增加,合金的摩擦系数减小,磨损失重和磨损体积增大,即合金耐磨性降低。

Effects of Cu Element on Microstructure and Properties of CuxAlFeNiCrTi (x =0,0.5,1.0) High-Entropy Alloys

CuxAlFeNiCrTi (x =0,0.5,1.0) high-entropy alloys were prepared by vacuum arc melting furnace.X-ray diffractometer (XRD),scanning electron microscopy (SEM),microhardness tester and wear tests were used to test the microstructure and properties of alloys,and the influence of Cu elements on the properties of high-entropy alloys were studied.Results showed that the alloy structure was dendrite,which was composed of BCC (body centered cubic) and FCC (face center cubic).With the increase of Cu element,the FCC phase content increased and the hardness of alloy decreased.Furthermore,with the increase of the content of Cu,the friction coefficient decreased,and the wear weight loss and wear volume increased,namely that the wear resistance of alloys became worse.