Effect of aging and ECAP on the mechanical properties of Ti- Nb alloy
SONG Jie1, FAN Zhi- guo2, JIANG Hong3, ZHAO Jia- feng1, LI Wei- chang1
（1.School of Mechanical and Electrical Engineering，Qingdao University of Technology, Qingdao 266300, Shandong, China 2.Irestal Shanghai Stainless Pipe Company Limited, Shanghai 200240, China 3.School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China）
Abstract：The equal channel angular pressing (ECAP) on Ti- 25%Nb（atom fraction） alloy at 400 ℃ has been investigated. The strength and super- elasticity can be improved after ECAP for Ti- 25%Nb alloy. The strength and super- elasticity would be improved further through ECAP and aging at 300 ℃ for one hour. Ti- 25%Nb alloy exhibits completely super- elasticity properties after two passes ECAP or aging at 300 ℃ following 4 passes ECAP, and the recovery strain is 1. 5%. The super- elasticity of the alloy is stable after ECAP and aging treatment with small strain (1. 5%), and the stable decreases with the increasing of the strain.
宋 杰，范志国，江 鸿，赵佳峰，李为昌. ECAP与时效对钛铌合金力学性能影响的研究[J]. , 2015, 22(4): 46-50.
SONG Jie, FAN Zhi- guo, JIANG Hong, ZHAO Jia- feng, LI Wei- chang. Effect of aging and ECAP on the mechanical properties of Ti- Nb alloy. , 2015, 22(4): 46-50.
H.Y. Kim, J.I. Kim, T. Inamura, H. Hosoda, et al. Effect of thermo-mechanical treatment on mechanical properties and shape memory behavior of Ti–(26–28)?at.% Nb alloys. Materials Science and Engineering: A, 2006, 438-440: 839-843.
[2]
H. Hosoda, Y. Kinoshita, Y. Fukui et al. Effects of short time heat treatment on superelastic properties of a Ti-Nb-Al biomedical shape memory alloy. Materials Science and Engineering: A, 2006, 438-440 870-874.
[3]
(俄)Ρ. З. 瓦利耶夫 И. В. 亚力克山卓夫著, 林柏年译,. 剧烈塑性形变纳米材料. 北京: 科学出版社, 2006
J. Burow, E. Prokofiev, C. Somsen, J. Frenzel, R. Z. Valiev, G. Eggeler. Martensitic transformations and functional stability in ultra-fine grained NiTi shape memory alloys. In Materials Science Forum, 2008; Vol. 584-586 PART 2, 852-857.
[7]
R. Z. Valiev, T. G. Langdon. Developments in the use of ECAP processing for grain refinement. Reviews on Advanced Materials Science, 2006, 13 (1): 15-26.
[8]
C. Y. Xie, Z. G. Fan, Z. H. Li, G. Q. Xiang, X. H. Cheng. Effects of high temperature ECAE process on microstructures and martensitic transformation of TiNi shape memory alloy. In Materials Science Forum, 2006; Vol. 503-504, 1013-1018.
[9]
Z. Fan, C. Xie. Shape memory behavior of Ti-50.9at%Ni alloy after ECAE processes. In Materials Science Forum, 2007; Vol. 561-565, 2313-2316.
[10]
H. Y. Kim, H. Satoru, J. I. Kim,et al. Mechanical properties and shape memory behavior of Ti-Nb alloys. Materials Transactions 2004, 45 (7): 2443-2448.
[11]
H. Y. Kim, Y. Ikehara, J. I. Kim, et al. Martensitic transformation, shape memory effect and superelasticity of Ti-Nb binary alloys. Acta Materialia, 2006, 54 (9): 2419-2429.
2015, Vol. 22 
