FeTiNbMoW高熵合金的组织和性能

发布时间：2018-04-19 09:03

  本文选题：高熵合金 + 微观组织　； 参考：《沈阳工业大学学报》2017年02期

【摘要】：为了研究一种能够吸收γ射线的含W合金的性能,按照等摩尔比设计了一种FeTiNbMoW五组元高熵合金.利用X射线衍射仪、扫描电子显微镜、能谱仪、显微硬度计、密度仪和万能力学试验机对合金的晶体结构、微观组织、成分、硬度、密度和压缩性能进行了分析.结果表明,FeTiNbMoW高熵合金组织由简单BCC固溶体基体和分布其上的少量金属间化合物组成.BCC结构的实际晶格常数为0.315 5 nm,组织形貌为典型枝晶组织.枝晶硬度和枝晶间硬度分别为830.05和793.04 HV.合金的实测密度为10.7 g/cm3,略高于其理论值10.21 g/cm3.室温下合金的抗压强度和对应塑性应变分别为604 MPa和3.19%.合金呈粉末性断裂,其断裂机制为解理断裂.
[Abstract]:In order to study the properties of a W-containing alloy capable of absorbing 纬 -ray, a five-component high entropy FeTiNbMoW alloy was designed according to the equal molar ratio.The crystal structure, microstructure, composition, hardness, density and compressive properties of the alloy were analyzed by means of X-ray diffractometer, scanning electron microscope, energy spectrometer, microhardness tester, densitometer and universal mechanical tester.The results show that the microstructure of FeTiNbMoW high entropy alloy consists of a simple BCC solid solution matrix and a small amount of intermetallic compounds distributed on it. The actual lattice constant of the structure is 0.315 nm, and the microstructure is a typical dendritic structure.The dendritic hardness and interdendritic hardness were 830.05 and 793.04 HV, respectively.The measured density of the alloy is 10.7 g / cm ~ (-3), slightly higher than its theoretical value of 10.21 g / cm ~ (3).The compressive strength and plastic strain of the alloy at room temperature are 604 MPa and 3.19 respectively.The alloy shows powder fracture and its fracture mechanism is cleavage fracture.
【作者单位】： 沈阳工业大学材料科学与工程学院;沈阳铸造研究所新技术研究中心;
【基金】：沈阳市科技计划项目(F14-231-1-22)
【分类号】：TG139
，

本文编号：1772450