Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Effects of Aging Treatment on Shape Memory and Fatigue Properties in Ni-rich Ti-Ni Alloy

Ni과잉 Ti-Ni 합금의 형상기억특성 및 피로 특성에 미치는 시효처리의 영향

  • Kim, J.I. (Materials Science and Engineering, Dong-A University) ;
  • Sung, J.H. (Materials Science and Engineering, Dong-A University) ;
  • Miyazaki, S. (Institute of Materials Science, University of Tsukuba) ;
  • Lee, S.H. (Materials Science and Engineering, Dong-A University)
  • Received : 2006.11.27
  • Accepted : 2006.12.27
  • Published : 2007.01.30
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Abstract

The fatigue properties of Ti-Ni shape memory alloy wires were investigated. In Ni-rich Ti-Ni shape memory alloys, $Ti_3Ni_4$ precipitates formed by aging treatments are believed to vary the shape memory and mechanical properties. In this study, the effect of aging temperature and aging time on shape memory properties and fatigue life were investigated using Ti-50.9 at% Ni alloy wires. The specimens were solution-treated at 1073 K for 3.6 ks followed by aging at 573 K, 673 K and 773 K for periods between 3.6 ks and 3600 ks. It was found that the fatigue life under a constant stress decreased with increasing aging temperature. When the specimens were aged at 573 K for periods between 36 ks and 360 ks, superior shape memory and fatigue properties were obtained. The fatigue life also decreased when the test temperature and strain amplitude increased. It was concluded that the fatigue life exhibited a linear relationship with the critical stress for slip.

Keywords

References

  1. S. Miyazaki, Y. Ohmi, K. Otsuka, and Y. Suzuki : J de Phys 43 (1982) (suppl.12): C4-255-260 https://doi.org/10.1051/jphys:01982004302025500
  2. S. Miyazaki, In: T.W. Duerig et al., editors. Engineering Aspects of Shape Memory Alloys. Butterworth-Heinenmann (1990) 394-413
  3. H. C. Lin and S. K. Wu : Acta Metall. Mater., 42 (1994) 1623-1630 https://doi.org/10.1016/0956-7151(94)90371-9
  4. D. Wurzel: Mater. Sci. and Eng., A 273-275 (1999) 643-638
  5. S. Miyazaki and K. Otsuka : Metall. Trans. A., 17A (1986) 53-63
  6. Miyazaki, I. Shiota, K. Otsuka, H. Tamura. MRS Int'l. Mtg. on Adv. Mats., 9 (1989) 153-156
  7. J. I. Kim and S. Miyazaki : Acta. Mater., 53 (2005) 4545-4554 https://doi.org/10.1016/j.actamat.2005.06.009
  8. T. H. Nam, T. Saburi and K. Shimizu : Mater. Trans. JIM, 31 (1990) 959 https://doi.org/10.2320/matertrans1989.31.959
  9. C. M. Hwang, M. Meichle, M. B. Salamon, C. M. Wayman : Phil. Mag. A, 47 (1983) 9-30 https://doi.org/10.1080/01418618308243106
  10. C. M. Hwang and C. M. Wayman : Scripta. Metall., 17 (1983) 1449-1453 https://doi.org/10.1016/0036-9748(83)90374-5
  11. F. Laves and H. J. Wallbaum : Z. Krist., 101 (1939) 78
  12. M. Nishida and C. M. Wayman : Metall. Trans., 18A (1987) 785-799
  13. T. Hara, T. Ohba, K. Otsuka and M. Nishida : Mater. Trans. JIM, 38 (1997) 277-284 https://doi.org/10.2320/matertrans1989.38.277
  14. T. Suburi, A. Nenno and T. Fukuda : J. Less-common Met., 125 (1986) 157 https://doi.org/10.1016/0022-5088(86)90090-1
  15. M. Nishida, C. M. Wayman, R. Kainuma and T. Honma : Scripta. Metal, 20 (1986) 899 https://doi.org/10.1016/0036-9748(86)90463-1
  16. T. Tadaki, Y. Nakata, K. Shimizu and K. Otsuka : Japan Inst. Metals, 27 (1986) 731 https://doi.org/10.2320/matertrans1960.27.731
  17. Y. S. Kim and S. Miyazaki : Proceeding of International Conference on Shape Memory and Superelastic Technologies (SMST-97), Pacific Grove, California, (1997) 473
  18. J. L. McNichols Jr, P. C. Brookes, and J. S. Cory : J. Appl. Phys., 52 (1981) 7442 https://doi.org/10.1063/1.328738
  19. H. Tobushi, E H. Lin, A. Ikai, and S. Yamada : Trans. Jpn. Soc. Mech. Eng., 61 (1995) 2355 https://doi.org/10.1299/kikaia.61.2355