退火处理对FeCrMnNiAl<sub>0.1</sub>Cu<sub>0.3</sub>高熵合金组织结构及耐腐蚀性能的影响

退火处理对FeCrMnNiAl_0.1Cu_0.3高熵合金组织结构及耐腐蚀性能的影响

摘要: 采用真空电弧熔炼制备了非等原子比FeCrMnNiAl_0.1Cu_0.3高熵合金，利用X射线衍射仪、扫描电镜、电化学工作站等研究了不同退火温度对合金组织结构、耐腐蚀性能和显微硬度的影响。结果表明：退火处理后，合金组织中有针状BCC相的析出，相结构由铸态FCC单相结构转变为FCC/BCC双相混合结构。800℃退火处理后，合金硬度达到最大值289 HV，相较于铸态提高了72%。随着退火温度提高，合金耐腐蚀性能呈上升趋势，900℃退火态合金由于其成分均匀性最好，耐腐蚀性最优。

Abstract: The non-isoatom ratio FeCrMnNiAl_0.1Cu_0.3 high entropy alloy was prepared by vacuum arc melting, and the effects of different annealing temperatures on the microstructure, corrosion resistance and microhardness of the alloy were studied using the X-ray diffractometer, scanning electron microscope and electrochemical workstation. The results show that after annealing, the needle-like BCC phase precipitates, and the phase structure changes from as-cast FCC single phase structure to FCC /BCC duplex mixed structure. The hardness of the alloy annealed at 800 ℃ reaches a maximum value of 289 HV, which is 72% higher than that of the cast alloy. As the annealing temperature increases, the corrosion resistance of the alloy is rising, and the 900 ℃ annealed alloy has the best corrosion resistance due to its best composition uniformity.