Skip to main content
SpringerLink
Log in

Effect of CO2 laser welding on the shape-memory and corrosion characteristics of TiNi alloys

  • Published:
Metallurgical and Materials Transactions A Aims and scope Submit manuscript

Abstract

A CO2 laser has been employed to join binary Ti50Ni50 and Ti49.5Ni50.5 shape-memory alloys (SMAs), with an emphasis on the shape-memory and corrosion characteristics. Experimental results showed that a slightly lowered martensite start (M S) temperature and no deterioration in shape-memory character of both alloys were found after laser welding. The welded Ti50Ni50, with an increased amount of B2 phase in the weld metal (WM), had higher strength and considerably lower elongation than the base metal (BM). Potentiodynamic tests revealed the satisfactory performance of laser-welded Ti50Ni50 in 1.5 M H2SO4 and 1.5 M HNO3 solutions. However, the WM exhibited a significantly higher corrosion rate and a less stable passivity than the BM in artificial saliva. On the other hand, the pseudoelastic behavior of the laser weld was investigated only for the Ti49.5Ni50.5 alloy, to facilitate tension cycling at room temperature. The cyclic deformation of Ti49.5Ni50.5 indicated that the stress required to form stress-induced martensite (σ m) and the permanent residual strain (ε p) were higher after welding at a given number of cycles (N), which were certainly related to the more inhomogeneous nature of the WM.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Engineering Aspects of Shape Memory Alloys, T.W. Duerig, K.N. Melton, D. Stockel, and C.M. Wayman, eds., Butterworth-Heinemann Ltd., London, 1990.

    Google Scholar 

  2. SMST-94 Proc. 1st Intl. Conf. on Shape Memory and Superelastic Technologies, A.R. Pelton, D. Hodgson, and T.W. Duerig eds., MIAS, Monterey, CA, 1994.

    Google Scholar 

  3. SMST-97 Proc. 2nd Intl. Conf. on Shape Memory and Superelastic Technologies, A.R. Pelton, D. Hodgson, S. Russell, and T.W. Duerig eds., MIAS, Monterey, CA, 1997.

    Google Scholar 

  4. M. Nishikawa, H. Tanaka, M. Kohda, T. Naganra, and K. Watanabe: J. Phys., 1982, vol. 43, Suppl. 12, pp. C4: 839–44.

    Google Scholar 

  5. J. Beyer, P.A. Besselink, and J.H. Cindenhorins: Proc. Intl. Symp. on Shape Memory Alloys, Y. Chu, T.Y. Hsu, and T. Ko, eds., Guilin, China, China Academic Publishers, Beijing, 1986, pp. 492–97.

    Google Scholar 

  6. A. Hirose, M. Uchihara, T. Araki, K. Honda, and M. Kondoh: J. Jpn. Inst., Met., 1990, vol. 54, pp. 262–69.

    CAS  Google Scholar 

  7. P. Schloßmacher, T. Haas, and A. Schußler: SMST-94 Proc. 1st Intl. Conf. on Shape Memory and Superelastic Technologies, A.R. Pelton, D. Hodgson, and T.W. Duerig eds., MIAS, Monterey, CA, 1994, pp. 85–90.

    Google Scholar 

  8. P. Schloßmacher, T. Haas, and A. Schußler: SMST-97 Proc. 2nd Intl. Conf. on Shape Memory and Superelastic Technologies, A.R. Pelton, D. Hodgson, S. Russell, and T.W. Duerig eds., MIAS, Monterey, CA, 1994, pp. 137–42.

    Google Scholar 

  9. J.-P. Randin: J. Biomed. Mater. Res., 1988, vol. 22, pp. 649–66.

    Article  CAS  Google Scholar 

  10. G. Rondelli, B. Vicentini, and A. Cigada: Corr. Sci., 1990, vol. 30, pp. 805–12.

    Article  CAS  Google Scholar 

  11. Y. Oshiki and S. Miyazaki: Corr. Eng., 1991, vol. 40, pp. 1009–25.

    Google Scholar 

  12. D. Starosvetsky, O. Khaselev, and J. Yahalom: Corrosion, 1998, vol. 54, pp. 524–30.

    Article  CAS  Google Scholar 

  13. H.C. Lin and S.K. Wu: Scripta Metall. Mater, 1992, vol. 26, pp. 59–62.

    Article  CAS  Google Scholar 

  14. JCPDS-ICDD, 1601 Park Lane, Swarthmore, PA 19081, 1994.

  15. R.E. Reed-Hill and R. Abbaschian: Physical Metallurgy Principles, 3rd ed., PWS-KENT Publishing Company, Boston, MA, 1992, pp. 444–46.

    Google Scholar 

  16. K. Otsuka and K. Shimizu: Intl. Met. Rev., 1986, vol. 31, pp. 93–114.

    CAS  Google Scholar 

  17. H.C. Lin and S.K. Wu: Acta Metall. Mater., 1994, vol. 42, pp. 1623–30.

    Article  CAS  Google Scholar 

  18. S. Miyazaki, Y. Ohmi, K. Otsuka, and Y. Suzuki: J. Phys., 1982, vol. 43, Suppl. 12, pp. C4: 255–60.

    Google Scholar 

  19. R.S. Dutta, K. Madangopal, H.S. Gadiyar, and S. Banerjee: Br. Corr. J., 1993, vol. 28, (3), pp. 217–21.

    CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Institute of Materials Science and Engineering, National Taiwan University, Taiwan 300, Republic of China

    Y. T. Hsu (Graduate Student, Process Engineer) & Y. R. Wang (Graduate Student, Process Engineer)

  2. the Taiwan Semiconductor Manufacturing Company, Hsinchu, Taiwan 300, Republic of China

    Y. T. Hsu (Graduate Student, Process Engineer) & Y. R. Wang (Graduate Student, Process Engineer)

  3. the Institute of Materials Science and Engineering, National Taiwan University, Taipei, Taiwan 106, Republic of China

    S. K. Wu (Professor) & C. Chen (Professor)

Authors
  1. Y. T. Hsu
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Y. R. Wang
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. S. K. Wu
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. C. Chen
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Hsu, Y.T., Wang, Y.R., Wu, S.K. et al. Effect of CO2 laser welding on the shape-memory and corrosion characteristics of TiNi alloys. Metall Mater Trans A 32, 569–576 (2001). https://doi.org/10.1007/s11661-001-0073-2

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11661-001-0073-2

Keywords

Search

Navigation