退火对AlCrMnFeNiCu_(x)(x=1.0,0.8,0.6)高熵合金微观组织和摩擦磨损性能的影响  

Effect of annealing on microstructure and friction and wear resistance of AlCrMnFeNiCu_(x)(x=1.0, 0.8, 0.6) high-entropy alloys

作　　者：孙文宇 田保红 张毅[1,2] 周孟 梁胜利[1,2] SUN Wen-yu;TIAN Bao-hong;ZHANG Yi;ZHOU Meng;LIANG Sheng-li(Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Pressing Technology,Luoyang 471023,China;Henan Province Key Laboratory of Nonferrous Materials Science and Processing Technology,Luoyang 471023,China)

机构地区：[1]有色金属新材料与先进加工技术省部共建协同创新中心,河南洛阳471023 [2]河南省有色金属材料科学与加工技术重点实验室,河南洛阳471023

出　　处：《材料热处理学报》2022年第5期71-78,共8页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(52071134);河南省优秀人才创新基金(ZYQR201912164);河南省高等学校重点科研项目(21A430013);河南省自然科学基金(202300410144)。

摘　　要：利用真空电弧炉制备了AlCrMnFeNiCu_(x)(x=1.0,0.8,0.6)高熵合金,并用场发射扫描电镜、X射线衍射仪和显微硬度仪等研究了铸态和400、800℃退火4 h后合金的微观组织、相结构和维氏硬度,用UMT-2多功能摩擦试验机研究了合金的干摩擦磨损性能。结果表明:退火处理后,合金的晶体结构未发生改变,均由两个BCC相和一个FCC相组成,即Fe-Cr(BCC)固溶体、Al-Ni(B2)固溶体和富Cu(FCC)固溶体。随着Cu含量的减少,合金的硬度逐渐增加;AlCrMnFeNiCu_(0.6)合金经过400℃退火4 h后的硬度最高,为486 HV10,耐磨性也最佳,磨损率为1.1×10^(-3)mm^(3)·N^(-1)·m^(-1)。摩擦磨损形貌表明合金的磨损机制均为粘着磨损和磨粒磨损。AlCrMnFeNiCu_(x)(x=1.0,0.8,0.6)high-entropy alloys were prepared by vacuum arc furnace.Microstructure,phase structure and Vickers hardness of the alloys as-cast and annealed at 400℃and 800℃for 4 h were studied by means of field emission scanning electron microscopy,X-ray diffractometer and microhardness tester,and the dry friction and wear properties of the alloy were studied by UMT-2 multifunctional friction tester.The results show that the crystal structure of the alloys has not changed after annealing,and is composed of two BCC phases and one FCC phase,namely Fe-Cr(BCC)solid solution,Al-Ni(B2)solid solution and Cu-rich(FCC)solid solution.With the decrease of Cu content,the hardness of the alloy increases gradually.The AlCrMnFeNiCu_(0.6) alloy has the highest hardness after annealing at 400℃for 4 h,which is 486 HV10,its wear resistance is also the best,and the wear rate is 1.1×10^(-3) mm^(3)·N^(-1)·m^(-1).The friction and wear morphology shows that the wear mechanisms of the alloys are adhesive wear and abrasive wear.

关 键 词：高熵合金 微观组织 力学性能 摩擦磨损 

分 类 号：TG146.2[一般工业技术—材料科学与工程]