High-speed micromachining characteristics for the NiTi shape memory alloys



Increasing use of the nitinol (NiTi), the nickel titanium alloy is primarily due to the fact that the medical fraternity is looking more toward less invasive medical procedures. Microengineering features such as microslots, grooves, and profiles of size 0.5 mm and below are required in the NiTi alloy-based medical components, but the material offers tremendous manufacturing difficulty due to its superior mechanical properties. High-speed micro machining was viewed as a possible way to process the NiTi-based medical components without compromising the productivity and quality of the machined surface textures. A study was undertaken to characterize the high-speed micromachining process for the NiTi alloy. More specifically, the optimization of the machining process parameters with the objective of reducing the milling forces and burr formation was focused upon. The study unveiled that the understanding the tool-work interface behavior is critically important for maximizing the machining performance of the NiTi alloy. Machining behavior characterized in terms of low cutting forces and reduced burr size was achieved at 15 m/min of cutting speed when the NiTi alloy undergoes a transition from B2 phase to B19 phase.


High-speed micromachining NiTi alloy Microslot Phase transition Strain hardening 


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  1. 1.
    Petrini L, Migliavacca F (2011) Biomedical applications of shape memory alloys. J Metall. doi: 10.1155/2011/501483
  2. 2.
    Huang H, Zheng HY, Liu Y (2005) Experimental investigations of the machinability of Ni50.6Ti49.4 alloy. Smart Mater Struct 14:297–301CrossRefGoogle Scholar
  3. 3.
    Lee ES, Shin TH (2011) An evaluation of the machinability of nitinol shape memory alloy by electrochemical polishing. J Mech Sci Technol 25(4):963–969CrossRefGoogle Scholar
  4. 4.
    Uppal N, Shiakolas PS (2008) Micromachining characteristics of NiTi based shape memory alloy using femtosecond laser. J Manuf Sci Eng 130(3):031117Google Scholar
  5. 5.
    Neyestanak AAL, Daneshmand S (2013) The effect of operational cutting parameters on Nitinol-60 in wire electro-discharge machining. Adv Mater Sci Eng. doi: 10.1155/2013/457186
  6. 6.
    Huang H (2004) A study of high-speed milling characteristics of nitinol. Mater Manuf Process 19(2):159–175CrossRefGoogle Scholar
  7. 7.
    Lin HC, Lin KM, Chen YC (2000) A study on the machining characteristics of TiNi shape memory alloys. J Mater Process Technol 105:327–332CrossRefGoogle Scholar
  8. 8.
    Weinert K, Petzoldt V, Kotter D, Buschka M (2004) Drilling of NiTi shape memory alloys. Mat-wiss u Werkstofftech 35(5):338–341CrossRefGoogle Scholar
  9. 9.
    Weinert K, Petzoldt V (2008) Machining NiTi micro-parts by micro-milling. Mater Sci Eng 481-482:672–675CrossRefGoogle Scholar
  10. 10.
    Biermann D, Kahleyss F, Krebs E, Upmaier T (2010) A study on micro-machining technology for the machining of NiTi: five -axis micro-milling and micro deep-hole drilling. J Mater Eng Perform 20(4–5):745–751Google Scholar
  11. 11.
    Brinson LC, Schmidt I, Lammering R (2004) Stress-induced transformation behaviour of a polycrystalline NiTi shape memory alloy: micro and macro-mechanical investigations via in situ optical microscopy. J Mech Phys Solids 52(7):1549–1571CrossRefMATHGoogle Scholar
  12. 12.
    Eaton-Evans J, Dulieu-Barton JM, Little EG, Brown IA (2008) Observations during mechanical testing of Nitinol. Proc IMechE: J Mech Eng Sci 222:97–105CrossRefGoogle Scholar
  13. 13.
    Duerig TW, Melton KN, Stöckel D (2013) Engineering aspects of shape-memory alloys. Butterworth-Heinemann publishersGoogle Scholar
  14. 14.
    Daly S, Ravichandran G, Bhattacharya K (2007) Stress-induced martensitic phase transformation in thin sheets of Nitinol. Acta Mater 55(10):3593–3600CrossRefGoogle Scholar
  15. 15.
    Gali K, Yang N, Sehitoglu H, Chumlyakov YI (2001) Fracture of precipitated NiTi shape memory alloys. Int J Fract 109(2):189–207CrossRefGoogle Scholar
  16. 16.
    Vojtěch D (2010) Influence on heat treatment of shape memory NiTi alloy on its mechanical properties. In: International Conference Metals 2010, Roznov pod Radhostem, Czech Republic, EU, 18–20 May 2010Google Scholar

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© Springer-Verlag London 2015

Authors and Affiliations

  1. 1.University of Cape TownCape TownSouth Africa
  2. 2.National Defense AcademyYokohamaJapan

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