Nb对选区激光熔化γ-TiAl基合金组织与性能的影响(英文)

被引:19
作者
Adam Ismaeel
王存山
机构
[1] 大连理工大学三束材料改性重点实验室
关键词
选区激光熔化; γ-TiAl基合金; 显微组织; 性能; Nb添加;
D O I
暂无
中图分类号
TG665 [光能加工设备及其加工]; TG146.23 [];
学科分类号
080201 ; 080502 ;
摘要
采用选区激光熔化技术,在TC4合金基体上制备不同Nb含量的γ-TiAl基Ti-Al-Mn-Nb合金。系统分析Nb含量对合金显微组织和性能的影响规律。研究结果表明,合金主是由四方结构的γ-TiAl和密排六方结构的α2-Ti3Al相组成,且随着Nb含量的增加,合金的凝固组织逐渐由枝晶状结构演化为层片状结构。因高含量Nb在γ-TiAl相中的固溶,以及细小板条状结构的形成,致使Nb含量为7.0 at.%的合金具有最佳的综合性能,即其不仅具有高的硬度(HV2000)、高的强度(1390MPa)和良好的塑性变形能力(24.5%),而且具有良好的摩擦磨损和高温抗氧化性能。
引用
收藏
页码:1007 / 1016
页数:10
相关论文
共 29 条
[1]   连续温度梯度热处理Ti-5Al-5Mo-5V-3Cr合金的显微组织演变与力学性能(英文) [J].
徐圣航 ;
刘咏 ;
刘彬 ;
王鑫 ;
陈智星 .
Transactions of Nonferrous Metals Society of China, 2018, 28 (02) :273-281
[2]   电子束选区熔化成形及后续热处理后Ti-47Al-2Nb-2Cr合金显微组织(英文) [J].
杨广宇 ;
贾文鹏 ;
赵培 ;
贾亮 ;
刘楠 ;
王建 ;
汤慧萍 .
稀有金属材料与工程, 2016, 45 (07) :1683-1686
[3]   Influence of heat treatments on microstructure and mechanical properties of laser additive manufacturing Ti-5Al-2Sn-2Zr-4Mo-4Cr titanium alloy [J].
Zhu, Yan-yan ;
Chen, Bo ;
Tang, Hai-bo ;
Cheng, Xu ;
Wang, Hua-ming ;
Li, Jia .
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, 2018, 28 (01) :36-46
[4]  
Selective laser melting of a novel Sc and Zr modified Al-6.2Mg alloy: Processing, microstructure, and properties[J] . Ruidi Li,Minbo Wang,Tiechui Yuan,Bo Song,Chao Chen,Kechao Zhou,Peng Cao.Powder Technology . 2017
[5]  
Selective laser melting of weak-textured commercially pure titanium with high strength and ductility: A study from laser power perspective[J] . X.P. Li,J. Van Humbeeck,J.P. Kruth.Materials & Design . 2017
[6]  
Selective laser melting of an oxide dispersion strengthened (ODS) γ-TiAl alloy towards production of complex structures[J] . C. Kenel,G. Dasargyri,T. Bauer,A. Colella,A.B. Spierings,C. Leinenbach,K. Wegener.Materials & Design . 2017
[7]  
Microstructural control and mechanical properties of a β-solidified γ-TiAl alloy Ti-46Al-2Nb-1.5V-1Mo-Y[J] . E.T. Zhao,H.Z. Niu,S.Z. Zhang,L. Feng,S.Y. Yang.Materials Science & Engineering A . 2017
[8]  
The prospects for additive manufacturing of bulk TiAl alloy[J] . M. Thomas,T. Malot,P. Aubry,C. Colin,T. Vilaro,P. Bertrand.Materials at High Temperatures . 2016 (4-5)
[9]  
Effect of substrate preheating on the texture, phase and nanohardness of a Ti-45Al-2Cr-5Nb alloy processed by selective laser melting[J] . Wei Li,Jie Liu,Yan Zhou,Shifeng Wen,Qingsong Wei,Chunze Yan,Yusheng Shi.Scripta Materialia . 2016
[10]  
Microstructure of γ-titanium aluminide processed by selective laser melting at elevated temperatures[J] . Joachim Gussone,Yves-Christian Hagedorn,Human Gherekhloo,Galina Kasperovich,Tarik Merzouk,Joachim Hausmann.Intermetallics . 2015