粉末冶金制备AlNiCrFe_xMo_(0.2)CoCu高熵合金  

AlNiCrFe_xMo_(0.2)CoCu High Entropy Alloys Prepared by Powder Metallurgy

作　　者：范玉虎[1] 张云鹏[1] 关红艳[1] 索会敏[1] 何力[1] 

机构地区：[1]西安理工大学,陕西西安710048

出　　处：《稀有金属材料与工程》2013年第6期1127-1129,共3页Rare Metal Materials and Engineering

摘　　要：采用粉末冶金方法制备AlNiCrFexMo0.2CoCu(x=0.5,1.0,1.5,2.0)高熵合金,研究Fe元素对合金组织和性能的影响。对4种合金进行XRD分析,发现当x=0.5、1.0和1.5时,有bcc、fcc和σ相组成,当x=2.0时,合金只有bcc和fcc两相。4种合金硬度随着Fe含量的增加而降低,当x=0.5时,布氏硬度为3170MPa,x=2.0时,布氏硬度为2290MPa。对合金进行压缩实验发现,断裂强度均超过1100MPa,且具有较好的塑性。AlNiCrFexMo0.2CoCu （x=0.5, 1.0, 1.5 2.0） high entropy alloys were prepared by the method of powder metallurgy. Effects of Fe content on microstructure, hardness and comprehensive mechanical properties were investigated. The XRD results show that constituent phases change from bcc＋fcc＋ σ at x=0.5 to bcc＋fcc at x=2.0. The hardness of the alloys varies from HBW3170 MPa at x=0.5 to HBW2290 MPa at x=2.0. The fracture strengths of all the AlNiCrFe x Mo 0.2 CoCu alloys are higher than 1100 MPa, and have a good plasticity.

关 键 词：高熵合金 粉末冶金 密度 硬度 压缩性能 

分 类 号：TF125[冶金工程—粉末冶金]