摘要
以三元MoNbZr高熵合金为研究对象,采用电弧熔炼法制备MoNbZr高熵合金,并采用Metalloscope、XRD、SEM和EDS等方法对合金微观组织的特征进行表征。结果表明,合金主要由发达的含高熔点组元Mo、Nb、Zr的枝晶组织组成,枝晶的特征长度约100μm,且大小均匀,有二次三次枝晶生成;合金的凝固组织具有一定的取向性;2μm左右的ZrO2粒子第二相弥散分布于合金中;铸态合金硬度达到739 HV,热处理后硬度达到796 HV。
A high entropy of multielement MoNbZr alloy was prepared by arc melt method, and the microstructure of the alloy was characterised by Metalloscope, XRD, SEM and EDS. It is found that the microstructure is composed of dendrite with characteristic length 100 i^m and higher concentration of Nb,Mo and Zr elements. The dendrite length has the same size. And a small amount of Ti, Cr elements exist. The microstructure shows a kind of directional solidification structure on some degree. ZrO2 second phase particles with 2μm in size disperse in the interdendrite region. The hardness of the as cast condition alloy is 739 HV, which can reach 796 HV after heat treatment.
出处
《热加工工艺》
CSCD
北大核心
2012年第24期117-120,共4页
Hot Working Technology
