Translated Titles

Effect of Annealing Temperature on the Mechanical Properties and the Spherical Indentation of NiTi Shape Memory Alloy



Key Words

形狀記憶合金 ; 超彈性 ; 可調變表面形貌 ; Shape Memory Alloy ; Superelasticity ; Tunable Surface Morphology



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Chinese Abstract


English Abstract

NiTi alloy is also called shape memory alloy (SMA). Its shape memory effect is derived from the phase transformation by the control of temperature. With the similar spherical indentation produced in the measurement of Brinell hardness, a surface topology inherited with residual stress was obtained on the polished SMA. Following the usual controlled heating performed in the SMA, the indented surface could nearly return to its flat surface configuration as the SMA went through the martensite to austenite transformation. This study firstly focused on how to implement the SMA material tensile test at different controlled temperatures. Thus, the associated mechanical properties at different temperatures were obtained, and the effect of annealing temperature on the SMA phase transformation was investigated. The thus formed spherical indents in shape memory alloys can have reversible depth change, deeper depth in the martensitic phase at low temperature and shallower depth in the austenitic phase at high temperature. Thus, by controlling the temperature of the SMA, a surface with tunable morphology was demonstrated feasible.

Topic Category 機電學院 > 製造科技研究所
工程學 > 機械工程
  1. [1] Z.G. Wang, X.T. Zu, P. Fu, J.Y. Dai, S. Zhu, L.M. Wang, "Two-way shape memory effect of TiNi alloy coil extension springs," Materials and Engineering A360, 2003, pp.126-131.
  2. [4] Sia Nemat-Nasser, Wei-Guo Guo, "Superelastic and cyclic response of NiTi SMA at various strain rates and temperatures," Mechanics of Materials 38, 2006, pp.463-474.
  3. [6] Li-Yu Tseng, An-Shik Yang, Chun-Ying Lee and Chang-Yu Hsieh, "CFD-based Optimization of a Diamond-Obstacles Inserted Micromixer with Boundary Protrusions," Engineering Applications of Computational Fluid Mechanics Vol.5, No.2, 2011, pp210-222.
  4. [8] J.A. Shaw, C.B. Churchill and M. AIadicola, "Tips and Tricks for Characterizing Shape Memory Alloy Wire: Part 1-Differential Scanning Calorimetry and Basic Phenomena," Experimental Techniques, September/October 2008.
  5. [10] Xu Huang and Yong Liu, "Effect of annealing on the transformation behavior and superelasticity of NiTi shape memory alloy," Scripta Materialia 45, 2001, pp.153-160.
  6. [11] W. Ni, Y.-T. Cheng, D.S. Grummon, "Recovery of microindents in a nickel-titanium shape memory alloy: "self-healing"effect," Applied Physics Letters, 2002.
  7. [12] Y. Zhang, Y.-T. Cheng, D.S. Grummon, "Two-way indent depth recovery in a NiTi shape memory alloy," Applied Physics Letters, 88 , 131904, 2006.
  8. [13] J.A.Shaw, C.B. Churchill and M.AIadicola, "Tips and Tricks for Characterizing Shape Memory Alloy Wire: Part 2-Fundamental Isothermal Responses," Experimental Techniques, January/February 2009.
  9. [14] L.C. Brinson, M.S. Huang, "Simplifications and Comparisons of Shape Memory Alloy Constitutive Models," Journal of Intelligent Material and Structures, Vol.7-January 1996, pp.108-144.
  10. [15] 劉人毅,形狀記憶合金之球面壓痕行為研究,碩士論文,國立台北科技大學機電整合研究所,台北,2011。
  11. [19] L.A. Middleton, N.F. Kennon and D.P. Dunne, "Metallographic Method for Nitinol," Metallography 17, 1985, pp.51-59.
  12. [21] J. Uchil, F.M. Braz Fernandes, K.K. Mahesh, "X-ray diffraction study of the phase transformations in NiTi shape memory alloy" Materials Characterization, 58, 2007, pp.243-248.
  13. [22] Y. Zhang, Y-T. Cheng, D.S.Grummon, "Understanding indentation-induced two-way shape memory effect" Materials Research Society, 2007.
  14. [2] http://highscope.ch.ntu.edu.tw/wordpress/?p=3272
  15. [3] http://www.stcsm.gov.cn/learning/lesson/course/detail.asp?id=92&lessonnum=3&coursenum=31, May 25, 2009
  16. [5] Y. Zhang, Y.-T. Cheng, D.S. Grummon, "Shape memory surfaces," Applied Physics Letters 89, 041912, 2006.
  17. [7] An-Shik Yang, Chun-Ying Lee, Li-Yu Tseng and Shao-Kai Liao, "Development of a Novel SMA-Tuned Micromixer" 3rd International Conference on Ferromagnetic Shape Memory Alloys, Dresden, 18.-22.07.2011 .
  18. [9] 蔡錫鐃,材料實驗,文京圖書有限公司,1995,第240-242頁。
  19. [16] Lidija Zorko, Rebeka Rudolf, "Metallographic Sample Preparation of Orthodontic Ni-Ti Wire, "Association of Metallurgical Engineers of Serbia, MJoM Vol.15(4), 2009, pp.267-274.
  20. [17] 許樹恩、吳泰伯,X光繞射原理與材料結構分析,新竹市:中國材料科學學會,2004年。
  21. [18] Y. Zhang, Y.-T. Cheng, D.S. Grummon, "Two-Way Shape Memory Surfaces," United States Patent Application Publication, Pub. No.:US2007/0163686 A1, 2007.
  22. [20] Cynthia L. Lach, Travis L. Thrner, Karen M. Taminger and Ravi N. Shenoy, "Effects of thermomechanical history on the tensile behavior of Nitinol ribbon," Annual International Symposium on Smart Structures and Materials; Active Materials: Behavior and Mechanics,Christopher S. Lynch (Editor), SPIE Vol. 4699, Paper No. 4699-45, San Diego, CA, 17-21 March 2002.