采用光学金相显微镜(OM)和扫描电子显微镜(SEM)等手段研究了一种含稀土元素Nd的Ti60钛合金在电子束焊接过程中富Nd第二相颗粒的演化及室温拉伸时的断裂特征.经过电子束焊接过程的快速熔化和凝固,Ti60钛合金中富Nd第二相颗粒经历了回溶和重新形核析出的过程,由原来的分散分布变为与凝固方向平行的断续串状分布,尺寸由原来的约10μm细化至约0.3μm.电子束焊接的焊缝及焊缝与母材的连接部位在室温拉伸时表现出了明显的沿晶脆性断裂特征.
参考文献
| [1] | M. R. Winstone;A. Partridge;J. W. Brooks .The contribution of advanced high-temperature materials to future aero-engines[J].Proceedings of the Institution of Mechanical Engineers, Part K. Journal of Multi-body Dynamics,2001(2):63-73. |
| [2] | Christoph Leyens;Frank Kocian;Joachim Hausmann;Wolfgang A. Kaysser .Materials and design concepts for high performance compressor components[J].Aerospace science and technology,2003(3):201-210. |
| [3] | BLENKINSOP P A.Developments in high temperature Ti alloys[A].,1984:2323-2338. |
| [4] | BANIA P J .An advanced alloy for elevated temperatures[J].JOM-Journal of the Minerals Metals and Materials Society,1988,3:20-22. |
| [5] | TETYUKHIN V;LEVIN I;ILYENKO V.Heat-resistant titanium alloys with enhanced,heat resistance,thermal stability[A].UK,1996:2430-2437. |
| [6] | LüTJERING G;WILLIAMS J C.Titanium[M].Heidelberg:Springer-Verlag,2003:244-246. |
| [7] | MESSLER R W.Electron beam weldability of advanced titanium alloys[J].Welding Research,1981(Supplement):79-84. |
| [8] | 陈光.航空发动机结构设计分析[M].北京:北京航空航天大学出版社,2006 |
| [9] | LI G P;LI D;LIU Y Y .Microstructure of second phase particles in Ti-5Al-4Sn-2Zr-1Mo-0.25Si-1Nd alloy[J].Metall Mater Trans (A),1997,28(02):1595-1605. |
| [10] | 刘羽寅,李阁平,李东,王青江,关少轩,李庆春.高温钛合金中稀土相的热稳定性[J].中国稀土学报,1998(02):162. |
| [11] | 郝传勇,时元宝,李正林,毛先锋.Ti-5Al-4Sn-2Zr-1Mo-0.25Si-1Nd合金焊接性[J].焊接学报,2003(03):9-12,16. |
| [12] | 钟群鹏;赵子华.断口学[M].北京:高等教育出版社,2006:203. |
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