Surface Characteristics of Machined NiTi Shape Memory Alloy: The Effects of Cryogenic Cooling and Preheating Conditions

  • Y. KaynakEmail author
  • B. Huang
  • H. E. Karaca
  • I. S. Jawahir


This experimental study focuses on the phase state and phase transformation response of the surface and subsurface of machined NiTi alloys. X-ray diffraction (XRD) analysis and differential scanning calorimeter techniques were utilized to measure the phase state and the transformation response of machined specimens, respectively. Specimens were machined under dry machining at ambient temperature, preheated conditions, and cryogenic cooling conditions at various cutting speeds. The findings from this research demonstrate that cryogenic machining substantially alters austenite finish temperature of martensitic NiTi alloy. Austenite finish (A f) temperature shows more than 25 percent increase resulting from cryogenic machining compared with austenite finish temperature of as-received NiTi. Dry and preheated conditions do not substantially alter austenite finish temperature. XRD analysis shows that distinctive transformation from martensite to austenite occurs during machining process in all three conditions. Complete transformation from martensite to austenite is observed in dry cutting at all selected cutting speeds.


cryogenic machining DSC analysis NiTi shape memory alloy surface integrity XRD analysis 



Support from the NASA EPSCOR Program under Grant No. NNX11AQ31A and the NASA FAP Aeronautical Sciences Project are greatly acknowledged.


  1. 1.
    T. Baxevanis, A. Cox, and D. Lagoudas, Micromechanics of Precipitated Near-Equiatomic Ni-Rich NiTi Shape Memory Alloys, Acta Mech., 2014, 225, p 1–19CrossRefGoogle Scholar
  2. 2.
    S.A. Shabalovskaya, On the Nature of the Biocompatibility and on Medical Applications of NiTi Shape Memory and Superelastic Alloys, Biomed. Mater. Eng., 1996, 6, p 267–289Google Scholar
  3. 3.
    S.A. Fadlallah, N. El-Bagoury, S.M. Gad El-Rab, R.A. Ahmed, and G. El-Ousamii, An Overview of NiTi Shape Memory Alloy: Corrosion Resistance and Antibacterial Inhibition for Dental Application, J. Alloys Compd., 2014, 583, p 455–464CrossRefGoogle Scholar
  4. 4.
    K. Gall, J. Tyber, G. Wilkesanders, S.W. Robertson, R.O. Ritchie, and H.J. Maier, Effect of Microstructure on the Fatigue of Hot-Rolled and Cold-Drawn NiTi Shape Memory Alloys, Mater. Sci. Eng. A, 2008, 486, p 389–403CrossRefGoogle Scholar
  5. 5.
    D.A. Miller and D.C. Lagoudas, Thermomechanical Characterization of NiTiCu and NiTi SMA Actuators: Influence of Plastic Strains, Smart Mater. Struct., 2000, 9, p 640–652CrossRefGoogle Scholar
  6. 6.
    J.A. Shaw and S. Kyriakides, Thermomechanical Aspects of NiTi, J. Mech. Phys. Solids, 1995, 43, p 1243–1281CrossRefGoogle Scholar
  7. 7.
    D.A. Miller and D.C. Lagoudas, Influence of Cold Work and Heat Treatment on the Shape Memory Effect and Plastic Strain Development of NiTi, Mater. Sci. Eng. A Struct., 2001, 308, p 161–175CrossRefGoogle Scholar
  8. 8.
    Y. Kaynak, H. Karaca, R. Noebe, and I. Jawahir, Analysis of Tool-Wear and Cutting Force Components in Dry, Preheated, and Cryogenic Machining of NiTI, Shape Memory Alloys, Procedia CIRP, 2013, 8, p 498–503CrossRefGoogle Scholar
  9. 9.
    Y. Kaynak, H.E. Karaca, R.D. Noebe, and I.S. Jawahir, Tool-Wear Analysis in Cryogenic Machining of NiTi Shape Memory Alloys: A Comparison of Tool-Wear Performance with Dry and MQL Machining, Wear, 2013, 306, p 51–63CrossRefGoogle Scholar
  10. 10.
    K. Weinert and V. Petzoldt, Machining of NiTi Based Shape Memory Alloys, Mater. Sci. Eng. A, 2004, 378, p 180–184CrossRefGoogle Scholar
  11. 11.
    H.-C. Kim, J. Yum, B. Hur, and G.S.-P. Cheung, Cyclic Fatigue and Fracture Characteristics of Ground and Twisted Nickel-Titanium Rotary Files, J. Endod., 2010, 36, p 147–152CrossRefGoogle Scholar
  12. 12.
    H. Huang, A study of High-Speed Milling Characteristics of Nitinol, Mater. Manuf. Process., 2004, 19, p 159–175CrossRefGoogle Scholar
  13. 13.
    Y. Kaynak, H. Karaca, and I.S. Jawahir, Cryogenic Machining of NiTi Shape Memory Alloy, 6th International Conference and Exhibition on Design and Production of Machines and Dies/Molds, 2011, p 23–26Google Scholar
  14. 14.
    Y. Kaynak, H. Tobe, R.D. Noebe, H. Karaca, and I.S. Jawahir, The Effects of Machining on Microstructure and Transformation behavior of NiTi Alloy, Scr. Mater., 2014, 74, p 60–63CrossRefGoogle Scholar
  15. 15.
    Y. Kaynak, H. Karaca, and I.S. Jawahir, Surface Integrity Characteristics of NiTi Shape Memory Alloys Resulting from Dry and Cryogenic Machining, Procedia CIRP, 2014, 13, p 393–398CrossRefGoogle Scholar
  16. 16.
    Y. Kaynak, Machining and Phase Transformation Response of Room-Temperature Austenitic NiTi Shape Memory Alloy, J. Mater. Eng. Perform., 2014, 23, p 3354–3360CrossRefGoogle Scholar
  17. 17.
    Y. Kaynak, H.E. Karaca, and I.S. Jawahir, Cutting Speed Dependent Microstructure and Transformation Behavior of NiTi Alloy in Dry and Cryogenic Machining, J. Mater. Eng. Perform., 2015, 24, p 452–460CrossRefGoogle Scholar
  18. 18.
    A.P. Stebner, S.C. Vogel, R.D. Noebe, T.A. Sisneros, B. Clausen, D.W. Brown, A. Garg, and L.C. Brinson, Micromechanical Quantification of Elastic, Twinning, and Slip Strain Partitioning Exhibited by Polycrystalline, Monoclinic Nickel-Titanium During Large Uniaxial Deformations Measured via In-Situ Neutron Diffraction, J. Mech. Phys. Solids, 2013, 61, p 2302–2330CrossRefGoogle Scholar
  19. 19.
    O. Benafan, S.A. Padula, R.D. Noebe, T.A. Sisneros, and R. Vaidyanathan, Role of B19′ Martensite Deformation in Stabilizing Two-Way Shape Memory Behavior in NiTi, J. Appl. Phys., 2012, 112, p 093510–093511CrossRefGoogle Scholar
  20. 20.
    K. Otsuka and X. Ren, Physical Metallurgy of Ti-Ni-Based Shape Memory Alloys, Prog. Mater. Sci., 2005, 50, p 511–678CrossRefGoogle Scholar
  21. 21.
    Y. Kaynak, H.E. Karaca, R.D. Noebe, and I. Jawahir, The Effect of Active Phase of The Work Material on Machining Performance of a NiTi Shape Memory Alloy, Metall. Mater. Trans. A, 2015, 46, p 2625–2636CrossRefGoogle Scholar
  22. 22.
    V. Sharma and M. Pandey, Optimization of Machining and Vibration Parameters for Residual Stresses Minimization in Ultrasonic Assisted Turning of 4340 Hardened Steel, Ultrasonics, 2016, 70, p 172–182CrossRefGoogle Scholar
  23. 23.
    A. Thakur and S. Gangopadhyay, State-of-the-Art in Surface Integrity in Machining of Nickel-Based Super Alloys, Int. J. Mach. Tools Manuf., 2016, 100, p 25–54CrossRefGoogle Scholar
  24. 24.
    Q. Wang and Z. Liu, Plastic Deformation Induced Nano-Scale Twins in Ti-6Al-4V Machined Surface with High Speed Machining, Mater. Sci. Eng. A, 2016, 675, p 271–279CrossRefGoogle Scholar
  25. 25.
    G. Rotella, O.W. Dillon, Jr., D. Umbrello, L. Settineri, and I.S. Jawahir, The Effects of Cooling Conditions on Surface Integrity in Machining of Ti6Al4V Alloy, Int. J. Adv. Manuf. Technol., 2014, 71, p 47–55CrossRefGoogle Scholar
  26. 26.
    B.D. Cullity and S.R. Stock, Elements of X-Ray Diffraction, Prentice Hall, Upper Saddle River, 2001Google Scholar
  27. 27.
    M.E. Mitwally and M. Farag, Effect of Cold Work and Annealing on the Structure and Characteristics of NiTi Alloy, Mater. Sci. Eng. A, 2009, 519, p 155–166CrossRefGoogle Scholar
  28. 28.
    I. Karaman, H.E. Karaca, Z. Luo, and H. Maier, The Effect of Severe Marforming on Shape Memory Characteristics of a Ti-Rich NiTi alloy Processed Using Equal Channel Angular Extrusion, Metall. Mater. Trans. A, 2003, 34, p 2527–2539CrossRefGoogle Scholar
  29. 29.
    H. Shahmir, M. Nili-Ahmadabadi, M. Mansouri-Arani, and T.G. Langdon, The Processing of NiTi Shape Memory Alloys by Equal-Channel Angular Pressing at Room Temperature, Mater. Sci. Eng. A, 2013, 576, p 178–184CrossRefGoogle Scholar
  30. 30.
    D.N.A. Shri, K. Tsuchiya, and A. Yamamoto, Surface Characterization of TiNi Deformed by High-Pressure Torsion, Appl. Surf. Sci., 2014, 289, p 338–344CrossRefGoogle Scholar
  31. 31.
    J. Uchil, F. Fernandes, and K. Mahesh, X-Ray Diffraction Study of the Phase Transformations in NiTi Shape Memory Alloy, Mater. Charact., 2007, 58, p 243–248CrossRefGoogle Scholar
  32. 32.
    S. De la Flor, C. Urbina, and F. Ferrando, Effect of Mechanical Cycling on Stabilizing the Transformation Behaviour of NiTi Shape Memory Alloys, J. Alloys Compd., 2009, 469, p 343–349CrossRefGoogle Scholar
  33. 33.
    J. Olbricht, A. Yawny, A. Condó, F. Lovey, and G. Eggeler, The Influence of Temperature on the Evolution of Functional Properties During Pseudoelastic Cycling of Ultra Fine Grained NiTi, Mater. Sci. Eng. A, 2008, 481, p 142–145CrossRefGoogle Scholar
  34. 34.
    Y. Kaynak, Process-Induced Surface Integrity in Machining of NiTi Shape Memory Alloys, University of Kentucky. Ph.D. Dissertation (2013)Google Scholar
  35. 35.
    A.S. Mahmud, H. Yang, S. Tee, G. Rio, and Y. Liu, Effect of Annealing on Deformation-Induced Martensite Stabilisation of NiTi, Intermetallics, 2008, 16, p 209–214CrossRefGoogle Scholar
  36. 36.
    Y. Liu and D. Favier, Stabilisation of Martensite Due to Shear Deformation via Variant Reorientation in Polycrystalline NiTi, Acta Mater., 2000, 48, p 3489–3499CrossRefGoogle Scholar
  37. 37.
    H. Lin, S. Wu, T. Chou, and H. Kao, The Effects of Cold Rolling on the Martensitic Transformation of an Equiatomic TiNi Alloy, Acta Metall. Mater., 1991, 39, p 2069–2080CrossRefGoogle Scholar
  38. 38.
    Y. Liu and Z. Xie, Detwinning in Shape Memory Alloy, Progress in Smart Materials and Structures, P.L. Reece, Ed., Nova Science Publishers Inc, NY, 2007, p 29–65Google Scholar
  39. 39.
    G. Tan and Y. Liu, Comparative Study of Deformation-Induced Martensite Stabilisation via Martensite Reorientation and Stress-Induced Martensitic Transformation in NiTi, Intermetallics, 2004, 12, p 373–381CrossRefGoogle Scholar
  40. 40.
    J.T. Lim and D.L. McDowell, Degradation of an Ni-Ti Alloy During Cyclic Loading, 1994 North American Conference on Smart Structures and Materials, International Society for Optics and Photonics, 1994, p 326–341Google Scholar

Copyright information

© ASM International 2017

Authors and Affiliations

  • Y. Kaynak
    • 1
    Email author
  • B. Huang
    • 2
    • 3
  • H. E. Karaca
    • 2
  • I. S. Jawahir
    • 2
    • 3
  1. 1.Department of Mechanical Engineering, Faculty of TechnologyMarmara UniversityIstanbulTurkey
  2. 2.Department of Mechanical Engineering, College of EngineeringUniversity of KentuckyLexingtonUSA
  3. 3.Institute for Sustainable Manufacturing (ISM)University of KentuckyLexingtonUSA

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