Skip to main content
SpringerLink
Log in

In situ transmission electron microscopy and nanoindentation studies of phase transformation and pseudoelasticity of shape-memory titanium-nickel films

  • Article
  • Published:
Journal of Materials Research Aims and scope Submit manuscript

Abstract

Transmission electron microscopy (TEM) and nanoindentation, both with in situ heating capability, and electrical resistivity measurements were used to investigate phase transformation phenomena and thermomechanical behavior of shape-memory titanium-nickel (TiNi) films. The mechanisms responsible for phase transformation in the nearly equiatomic TiNi films were revealed by heating and cooling the samples inside the TEM vacuum chamber. Insight into the deformation behavior of the TiNi films was obtained from the nanoindentation response at different temperatures. A transition from elastic-plastic to pseudoelastic deformation of the martensitic TiNi films was encountered during indentation and heating. In contrast to the traditional belief, the martensitic TiNi films exhibited a pseudoelastic behavior during nanoindentation within a specific temperature range. This unexpected behavior is interpreted in terms of the evolution of martensitic variants and changes in the mobility of the twinned structures in the martensitic TiNi films, observed with the TEM during in situ heating.

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. T. Duerig, A. Pelton, and D. Stöckel: An overview of nitinol medical applications. Mater. Sci. Eng. A 273–275, 149 (1999).

    Google Scholar 

  2. J. Van Humbeeck: Non-medical applications of shape memory alloys. Mater. Sci. Eng. A 273–275, 134 (1999).

    Google Scholar 

  3. A. Ishida, and V. Martynov: Sputter-deposited shape-memory alloy thin films: Properties and applications. MRS Bull. 27(2), 111 (2002).

    CAS  Google Scholar 

  4. Y. Liu, and Z. Xie: TEM in situ study of the pre-strained NiTi shape memory alloy—driving force for shape recovery? Mater. Sci. Eng. A 361, 185 (2003).

    Google Scholar 

  5. X.-G. Ma, and K. Komvopoulos: Nanoscale pseudoelastic behavior of indented titanium-nickel films. Appl. Phys. Lett. 83, 3773 (2003).

    CAS  Google Scholar 

  6. X.-G. Ma, and K. Komvopoulos: Pseudoelasticity of shapememory titanium-nickel films subjected to dynamic nanoindentation. Appl. Phys. Lett. 84, 4274 (2004).

    CAS  Google Scholar 

  7. L. Qian, X. Xiao, Q. Sun, and T. Yu: Anomalous relationship between hardness and wear properties of a superelastic nickeltitanium alloy. Appl. Phys. Lett. 84, 1076 (2004).

    CAS  Google Scholar 

  8. W.C. Oliver and G.M. Pharr: An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments. J. Mater. Res. 7, 1564 (1992).

    CAS  Google Scholar 

  9. W. Lu, and K. Komvopoulos: Nanotribological and nanomechanical properties of ultrathin amorphous carbon films synthesized by radio frequency sputtering. J. Tribol. 123, 641 (2001).

    CAS  Google Scholar 

  10. Y. Liu and Z.L. Xie: Twinning and detwinning of 〈011〉 type II twin in shape memory alloy. Acta Mater. 51, 5529 (2003).

    CAS  Google Scholar 

  11. T.W. Duerig, K.N. Melton, D. Sto¨ckel, and C.M. Wayman: Engineering Aspects of Shape Memory Alloys (Butterworth-Heinemann, 1990).

    Google Scholar 

  12. S.K. Wu and C.M. Wayman: On the reciprocal lattice of the “premartensitic” R-phase in TiNi shape memory alloys. Acta Metall. 37, 2805 (1989).

    CAS  Google Scholar 

  13. T. Fukuda, T. Saburi, K. Doi, and S. Nenno: Nucleation and selfaccommodation of the R-phase in Ti–Ni alloys. Mater. Trans., JIM 33, 271 (1992).

    CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Mechanical Engineering, University of California, Berkeley, California, 94720, USA

    X. G. Ma & K. Komvopoulos

Authors
  1. X. G. Ma
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. K. Komvopoulos
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to K. Komvopoulos.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Ma, X.G., Komvopoulos, K. In situ transmission electron microscopy and nanoindentation studies of phase transformation and pseudoelasticity of shape-memory titanium-nickel films. Journal of Materials Research 20, 1808–1813 (2005). https://doi.org/10.1557/JMR.2005.0226

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1557/JMR.2005.0226

Search

Navigation