摘要
利用"团簇+连接原子"结构模型构建了Ti-Fe-Zr-Y合金化双团簇模型,由此设计出成分为Ti_(64.52)Fe_(29.32)Zr_(5.86)Y_(0.30)的四元共晶合金,并利用激光快速成形技术在纯钛板上制备了该合金的成形体。利用X射线衍射仪、扫描电镜、电子探针、3D表面轮廓仪、显微硬度计、纳米压痕仪和电化学工作站,系统研究合金成形体的显微组织、表面粗糙度、硬度、弹性模量和耐蚀性能,并与Ti_(70.60)Fe_(29.40)二元共晶合金成形体进行了对比分析。结果表明:Ti_(64.52)Fe_(29.32)Zr_(5.86)Y_(0.30)合金呈现出细小的树枝状共晶组织形貌特征。钇的添加有效地抑制了Ti_4Fe_2O氧化物的形成,并增加了合金的成形性。Ti_(64.52)Fe_(29.32)Zr_(5.86)Y_(0.30)合金的硬度较Ti_(70.60)Fe_(29.40)合金的硬度提高了14%,弹性模量降低了32%,且该四元合金在Hank’s溶液中的耐蚀性明显优于Ti_(70.60)Fe_(29.40)二元共晶合金。
A Ti_（64.52）Fe_（29.32）Zr_（5.86）Y_（0.30） alloy was designed through a ＂cluster-plus-glue-atom＂ model, and then was prepared by laser rapid prototyping on pure titanium substrate. The microstructure, formability, hardness, elastic modulus, and corrosion resistance of the alloy were investigated by X-ray diffraction, scanning electron microscopy, 3D surface profiler, micro-hardness tester, nano indenter and electrochemical work station, and comparative analysis with Ti_（70.60）Fe_（29.40） binary eutectic alloy was conducted. The results show that the microstructure of the Ti_（64.52）Fe_（29.32）Zr_（5.86）Y_（0.30） alloy is featured with dendritic eutectic structure. Y addition not only suppresses the formation of Ti_4Fe_2O oxide, but also improves the formability of the alloy. The hardness of the Ti_（64.52）Fe_（29.32）Zr_（5.86）Y_（0.30） alloy is improved by 14% compared with that of Ti_（70.60）Fe_（29.40） alloy. Whereas the elastic modulus is reduced by 32%. Moreover, the corrosion resistance of Ti_（64.52）Fe_（29.32）Zr_（5.86）Y_（0.30） alloy is superior to that of Ti_（70.60）Fe_（29.40） alloy in Hank＇s solution.
作者
韩立影
王存山
羌建兵
HAN Li-ying;WANG Cun-shanl;QIANG Jian-bing(Key Laboratory for Materials Modification by Laser, Ion, and Electron Beams, Ministry of Education, Dalian University of Technology, Dalian 116023, China;Laser Advanced Manufacturing Technology Center, University of Science and Technology Liaoning, Anshan 114051, China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2018年第3期474-482,共9页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目(51371041)~~
关键词
钛合金
激光快速成形
成分设计
组织
性能
titanium alloy
laser rapid prototyping
composition design
microstructure
property
