Advertisement

Effect of Aging Heat Treatment on the High Cycle Fatigue Life of Ni50.3Ti29.7Hf20 High-Temperature Shape Memory Alloy

  • Hasan H. Saygili
  • H. Onat Tugrul
  • Benat Kockar
Article
  • 15 Downloads

Abstract

Shape memory alloys can be utilized as actuators for several applications in aerospace industry which require high strength and stable actuation cycles together with the transformation temperatures above 100 °C. Aging is one of the methods for Nickel rich NiTiHf alloys that adjusts the transformation temperatures and enhances the cyclic stability due to the formation of nano-sized precipitates. In this study, the high cycle functional fatigue life and behavior of the extruded and aged Ni50.3Ti29.7Hf20 high-temperature shape memory alloy were investigated in order to reveal the effect of aging on the stability of the actuation strain and transformation temperatures. The aging was conducted at 550 °C for 3 h. 200 MPa was chosen in the functional fatigue experiments since no irrecoverable strain was determined under this stress magnitude for the extruded and the aged samples in the load-biased heating cooling experiments. The fatigue experiments were conducted twice to check the repeatability of the shape memory properties of the samples and it was observed that the life cycle of the aged sample was determined as 20,337 and the extruded sample completely lost the shape recovery ability after 5000 cycles.

Keywords

Fatigue NiTiHf Shape memory Aging 

Notes

Acknowledgements

This study was supported by the Turkish Aviation Industry under Grant No. DKTM/2015/10.

References

  1. 1.
    Singh K, Sirohi J, Chopra I (2003) An improved shape memory alloy actuator for rotor blade tracking. J Intell Mater Syst Struct 14(12):767–786CrossRefGoogle Scholar
  2. 2.
    Strelec JK, Lagoudas DC, Khan MA, Yen J (2003) Design and implementation of a shape memory alloy actuated reconfigurable airfoil. J Intell Mater Syst Struct 14(4–5):257–273CrossRefGoogle Scholar
  3. 3.
    Hartl DJ, Lagoudas DC (2007) Aerospace applications of shape memory alloys. J Aerosp Eng 221(4):535–552Google Scholar
  4. 4.
    Sanders B, Crowe R, Garcia E (2004) Defense advanced research projects agency–Smart materials and structures demonstration program overview airfoil. J Intell Mater Syst Struct 15(4):227–233CrossRefGoogle Scholar
  5. 5.
    Godard OJ, Lagoudas MZ, Lagoudas DC (2003) Design of space systems using shape memory alloys. Smart Mater Struct 5056:545–558Google Scholar
  6. 6.
    Otsuka K, Ren X (2005) Physical metallurgy of Ti–Ni-based shape memory alloys. Prog Mater Sci 50:511–678CrossRefGoogle Scholar
  7. 7.
    Kockar B, Karaman I, Kim JI, Chumlyakov YI, Sharp J, Yu CJM (2008) Thermomechanical cyclic response of an ultrafine-grained NiTi shape memory alloy. Acta Mater 56:3630–3646CrossRefGoogle Scholar
  8. 8.
    Kockar B, Karaman I, Kulkarni A, Chumlyakov Y, Kireeva IV (2007) Effect of severe ausforming via equal channel angular extrusion on the shape memory response of a NiTi alloy. J Nucl Mater 361:298–305CrossRefGoogle Scholar
  9. 9.
    Ma J, Karaman I, Noebe RD (2010) High temperature shape memory alloys. Int Mater Rev 55(5):257–315CrossRefGoogle Scholar
  10. 10.
    Kockar B, Atli KC, Ma J, Haouaoui M, Karaman I, Nagasako M, Kainuma R (2010) Role of severe plastic deformation on the cyclic reversibility of a Ti50.3Ni33.7Pd16 high temperature shape memory alloy. Acta Mater 58:6411–6420CrossRefGoogle Scholar
  11. 11.
    Santamarta R, Arroyave R, Pons J, Evirgen A, Karaman I, Karaca HE, Noebe RD (2013) TEM study of structural and microstructural characteristics of a precipitate phase in Ni-rich Ni–Ti–Hf and Ni–Ti–Zr shape memory alloys. Acta Mater 61:6191–6206CrossRefGoogle Scholar
  12. 12.
    Kockar B, Karaman I, Kim JI, Chumlyakov Y (2006) A method to enhance cyclic reversibility of NiTiHf high temperature shape memory alloys. Scr Mater 54:2203–2208CrossRefGoogle Scholar
  13. 13.
    Meng XL, Zheng YF, Wang Z, Zhao LC (2000) Shape memory properties of the Ti36Ni49Hf15 high temperature shape memory alloy. Mater Lett 45:128–132CrossRefGoogle Scholar
  14. 14.
    Karaca HE, Acar E, Tobe H, Saghaian SM (2014) NiTiHf-based shape memory alloys. Mater Sci Technol 30(13):1530–1544CrossRefGoogle Scholar
  15. 15.
    Evirgen A, Karaman I, Santamarta R, Pons J, Noebe RD (2015) Microstructural characterization and shape memory characteristics of the Ni50.3Ti34.7Hf15 shape memory alloy. Acta Mater 83:48–60CrossRefGoogle Scholar
  16. 16.
    Meng XL, Cai W, Fu YD, Li QF, Zhang JX, Zhao LC (2008) Shape-memory behaviors in an aged Ni-rich TiNiHf high temperature shape-memory alloy. Intermet 16:698–705CrossRefGoogle Scholar
  17. 17.
    Evirgen A, Basner F, Karaman I, Noebe RD, Pons J, Santamarta R (2012) Effect of aging on the martensitic transformation characteristics of a Ni-rich NiTiHf high temperature shape memory alloy. Funct Mater Lett 5(4):1250038CrossRefGoogle Scholar
  18. 18.
    Karaca HE, Saghaian SG, Ded G, Tobe H, Basaran B, Maier HJ, Noebe RD, Chumlyakov YI (2013) Effects of nanoprecipitation on the shape memory and material properties of an Ni-rich NiTiHf high temperature shape memory alloy. Acta Mater 61:7422–7431CrossRefGoogle Scholar
  19. 19.
    Saghaian SM, Karaca HE, Souri M, Turabi AS, Noebe RD (2016) Tensile shape memory behavior of Ni50.3Ti29.7Hf20 high temperature shape memory alloys. Mater Des 101:340–345CrossRefGoogle Scholar
  20. 20.
    Bigelow GS, Garg A, Padula SA II, Gaydosh DJ, Noebe RD (2011) Load-biased shape-memory and superelastic properties of a precipitation strengthened high-temperature Ni50.3Ti29.7Hf20 alloy. Scr Mater 64:725–728CrossRefGoogle Scholar
  21. 21.
    Karakoc O, Hayrettin C, Bass M, Wang SJ, Canadinc C, Mabe HJ, Lagoudas DC, Karaman I (2017) Effects of upper cycle temperature on the actuation fatigue response of NiTiHf high temperature shape memory alloys. Acta Mater 138:185–197CrossRefGoogle Scholar
  22. 22.
    Karakoc O, Hayrettin C, Canadinc D, Karaman I (2018) Role of applied stress level on the actuation fatigue behavior of NiTiHf high temperature shape memory alloys. Acta Mater 153:156–168CrossRefGoogle Scholar
  23. 23.
    Miyazaki S, Igo Y, Otsuka K (1986) Effect of thermal cycling on the transformation temperatures of Ti-Ni alloys. Acta Metall 34:2045–2051CrossRefGoogle Scholar
  24. 24.
    McCormick PG, Liu Y (1994) Thermodynamic analysis of the martensitic transformation in NiTi-II. Effect of transformation cycling. Acta Metall Mater 42:2407–2413CrossRefGoogle Scholar

Copyright information

© ASM International 2018

Authors and Affiliations

  • Hasan H. Saygili
    • 1
    • 2
  • H. Onat Tugrul
    • 1
  • Benat Kockar
    • 1
  1. 1.Department of Mechanical EngineeringHacettepe UniversityAnkaraTurkey
  2. 2.Turkish Aviation Industry, Rotary Wing Technology CenterAnkaraTurkey

Personalised recommendations