Ti元素对CoCuFeNiVTi_x高熵合金耐磨性能的影响  

Effect of titanium content on wear resistance of CoCuFeNiVTi_x high-entropy alloys

作　　者：叶海梅[1,2,3] 杨文超[1,2,3] 庞兴志 杨剑冰[1,2,3] 湛永钟 

机构地区：[1]广西大学材料科学与工程学院,广西南宁530004 [2]广西有色金属及特色材料加工重点实验室,广西南宁530004 [3]广西生态型铝产业协同创新中心,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2017年第3期1187-1191,共5页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51361002;51161002);广西教育厅科研项目(KY2016YB022);广西大学广西有色金属及特色材料加工重点实验室开放基金(GXKFJ1201;GXKFJ16-15;GXKFJ16-02)

摘　　要：为了研究Ti元素含量对CoCuFeNiVTi_x高熵合金体系耐磨性能的影响,用真空电弧熔炼炉制备了CoCuFeNiVTi_x(x=0.5,1.0,1.5,2.0)高熵合金,采用HV-50型显微硬度计对其硬度和耐磨性能进行了测试,采用扫描电子显微镜对其磨损形貌进行了观察。实验结果表明:Ti含量为0.5和1.0时,合金为FCC+BCC结构;Ti含量升至1.5和2.0时,合金转变为BCC结构。随着Ti含量的增加,合金的硬度及耐磨性能都得到提高,合金由磨粒磨损和粘着磨损演变为以粘着磨损为主。其中,CoCuFeNiVTi_(1.5)合金的摩擦系数最低(0.45),并且硬度达到最高值589 Hv。综合来说,CoCuFeNiVTi_(1.5)合金的耐磨性能最好。In order to investigate the effect of titanium content on wear resistance of CoCuFeNiVTi_x high-entropy alloys system,the CoCuFeNiVTi_x( x = 0. 5,1. 0,1. 5,2. 0) alloys were prepared by vacuum arc melting furnace. The hardness and wear resistance were tested, and the wear morphology were observed by SEM. The results show that when the content of Ti is 0. 5 and 1. 0,the structure of the alloy is FCC+BCC,when the content of Ti increases to 1. 5 and 2. 0,the alloy transform into BCC structure. With the increasing of Ti content,the hardness and wear resistance of the alloys can be significantly enhanced,and the wear mechanism of alloys change from abrasivewear and adhesive wear coexisting to adhesive wear. Especially the CoCuFeNiVTi_(1.5)alloy has the lowest coefficient of friction( 0. 45),and the hardness reaches the highest value of 589 Hv. In general,the wear resistance of CoCuFeNiVTi_(1.5)alloy is greatest.

关 键 词：高熵合金 硬度 耐磨性能 磨损形貌 

分 类 号：TG113.25[金属学及工艺—物理冶金]