Microstructure and properties of FeTiNbMoW high entropy alloy
REN Ying-lei
WU Hai-liang
YU Bo
LIU Shi-chang
QIU Ke-qiang
Abstract：In order to research the properties of a W-containing alloy with the capacity of absorbing γ ray, a FeTiNbMoW five-element high entropy alloy was designed according to the equimolar ratio.The crystal structure, microstructure, composition, hardness, density and compression performance of the alloy were analyzed with X ray diffractometer (XRD), scanning electron microscope (SEM), energy disperse spectroscope (EDS), microhardness tester, density gauge and universal mechanical testing machine.The results show that the microstructure of FeTiNbMoW high entropy alloy is composed of simple BCC solid solution matrix and a small amount of intermetallic compounds distributing on the matrix.In addition, the actural lattice constant of BCC structure is 0.3155nm, and the microstructural morphology is typical dendritic structure.The dendritic hardness and interdendritic hardness are 830.05 and 793.04HV, respectively.The measured density of the alloy is 10.7g/cm3, which is slightly higher than its theoretical value of 10.21g/cm3.The compressive strength and plastic strain of the alloy at room temperature are 604MPa and 3.19%, respectively.The alloy exhibits powder fracture, and the fracture mode is cleavage fracture.
Keywords：high entropy alloymicrostructurecompositionlattice constanthardnessdensitycompressive strengthplastic strain
Publication Date：2017-03-02
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 142-146 )