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Mo元素含量对FeAlCuCrNiMox系高熵合金组织结构及性能的影响
苏允海, 邓越, 窦丽杰, 梁学伟
沈阳工业大学, 沈阳 110023
摘要:
为了研究Mo元素对FeAlCuCrNiMox系高熵合金的组织结构及性能的影响,将FeAlCuCrNiMox系高熵合金粉末制备成药芯焊丝,并用气体保护堆焊到45钢表面制备出FeAlCuCrNiMox系高熵合金,而后对堆焊层进行硬度、显微组织、物相组成及耐蚀性能分析. 结果表明,FeCuCrAlNiMox系堆焊高熵合金呈现单一的AlFe固溶体,晶格结构为体心立方. 当x = 0.8时,合金堆焊层的晶粒尺寸最为细小,晶界强化明显,硬度最高,平均硬度达到47.8 HRC,磨损量最小,为0.08 g. 加入一定量的Mo元素之后腐蚀电位降低,即耐腐蚀性能下降.
关键词:  高熵合金  晶界强化  组织结构  力学性能  电化学腐蚀
DOI:10.12073/j.hjxb.2019400245
分类号:TG422
基金项目:国家重点研发计划(2017YFB1103603)
Effect of Mo content on microstructure and properties of FeAlCuCrNiMox alloy
SU Yunhai, DENG Yue, DOU Lijie, LIANG Xuewei
Shenyang University of Technology, Shenyang 110023, China
Abstract:
In order to study the effect of Mo element on the microstructure and other properties of FeAlCuCrNiMox high entropy alloys, FeAlCuCrNiMox high entropy alloy powder was used as core flux wire and then surfaced on 45 steel plate with gas protection. The hardness, microstructure and corrosion resistance of the weld were analyzed The results showed that FeCuCrAlNiMox series high entropy alloy consist of single body centered cubic AlFe phase. When x=0.8, the structure of alloy surfacing layer was minimal, the grain boundary was obviously strengthened, the hardness of the alloy surfacing layer was the highest, the average hardness was 47.8 HRC, and the minimum wear amount was 0.08 g. The corrosion potential reduced after a certain amount of Mo element was added, this meant that the corrosion resistance was worse.
Key words:  high entropy alloy  grain size strengthening  microstructure  mechanical property  electrochemical corrosion