AlBxCrCu0.5FeTi高熵合金的微观组织与硬度研究  

Study on Microstructure and Hardness of AlBxCrCu0.5FeTi High-entropy Alloy

作　　者：代丽[1] 刘黎明[1] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《广州化工》2012年第16期66-68,共3页GuangZhou Chemical Industry

基　　金：西南科技大学青年基金项目(No:11zx7153)

摘　　要：研究AlBxCrCu0.5FeTi(x=0,0.2,0.4和0.6)高熵合金的组织,以及硬度与B含量的关系。利用真空电弧炉熔铸AlBxCrCu0.5FeTi高熵合金,使用金相显微镜、XRD、电化学工作站和显微硬度仪对合金进行表征分析。结果表明,该系合金的铸态组织是典型的树枝晶,AlBxCrCu0.5FeTi高熵合金铸态结构是简单的体心立方结构(BCC)和面心立方(FCC),高熵效应使AlBxCrCu 0.5FeTi合金具有简单的晶体结构;AlBxCrCu0.5FeTi(x=0,0.2,0.4和0.6)的硬度随含量B从0.2到0.6的增加而增加,其原因是B的加入使AlBxCrCu0.5FeTi合金晶格畸变加剧,发生固溶强化作用,合金硬度增加。合金AlB0.6CrCu0.5FeTi的腐蚀电流为3.024×10-6A/cm2,腐蚀电位为-0.369 V,显示出良好的耐腐蚀性能。The microstructure and the effect of B content on the hardness of A1BxCrCu0.5FeTi （x = 0, 0. 2, 0.4, and 0.6 ） high - entropy alloy produced by the arc melting and casting method were investigated by the analytical methods of metallurgical microscope, scanning electron microscope and Vickers hardness tester. It was found that the as - cast structure of A1BxCrCu0.5FeTi alloys was dendrites, and the alloys exhibit quite simple FCC and BCC solid solution phases due to high entropy. The hardness of alloys increased as B content increased from 0.2 to 0.6, and the reason was that the lattice distortion of A1BxCrCu0.5FeTi alloy was increased with B introduction which resulted in solution hardening and the increase of hardness. The corrosion current and corrosion potential of theA1B0.6CrCu0.5FeTi alloy were 3. 024 × 10 -6 A/ cm2 and -0. 369 V, respectively, with excellent corrosion resistance.

关 键 词：高熵合金 组织 晶格畸变 硬度 

分 类 号：TG113.12[金属学及工艺—物理冶金] TG113.25[金属学及工艺—金属学]