Microstructure and mechanical properties of NbZrTi and NbHfZrTi alloys  

作　　者：Yu-Min Hu Xiao-Dong Liu Na-Na Guo Liang Wang Yan-Qing Su Jing-Jie Guo 

机构地区：[1]Harbin Medical University Cancer Hospital,Harbin 150001,China [2]National Key Laboratory for Precision Hot Processing of Metals,School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China

出　　处：《Rare Metals》2019年第9期840-847,共8页稀有金属（英文版）

基　　金：financially supported by the National Basic Research Program of China(No.2011CB610406);National Natural Science Foundation of China (No.51425402)

摘　　要：Two medium-entropy alloys,NbZrTi and NbHfZrTi,were prepared by arc melting.Both NbZrTi and NbHfZrTi alloys are composed of simple body-centered cubic(bcc)solid solution phase and exhibit dendritic structure.After being homogenized,both NbZrTi and NbHfZrTi alloys are still composed of the single bcc solid solution phase,but the microstructure of the two alloys transforms from the dendritic structure into the polycrystalline structure.Two alloys display significantly workhardening effect during compression at room temperature and show relatively good deformation plasticity during compressive deformation at room temperature.For NbZrTi and NbHfZrTi alloys,the dynamic recrystallized grains form along the boundary during compression at the temperatures of 1073 and 1273 K.Two medium-entropy alloys,NbZrTi and NbHfZrTi,were prepared by arc melting.Both NbZrTi and NbHfZrTi alloys are composed of simple body-centered cubic(bcc)solid solution phase and exhibit dendritic structure.After being homogenized,both NbZrTi and NbHfZrTi alloys are still composed of the single bcc solid solution phase,but the microstructure of the two alloys transforms from the dendritic structure into the polycrystalline structure.Two alloys display significantly workhardening effect during compression at room temperature and show relatively good deformation plasticity during compressive deformation at room temperature.For NbZrTi and NbHfZrTi alloys,the dynamic recrystallized grains form along the boundary during compression at the temperatures of 1073 and 1273 K.

关 键 词：PHASE MICROSTRUCTURE MECHANICAL PROPERTIES 

分 类 号：TG139[一般工业技术—材料科学与工程]