Proceedings of the 2015 4th International Conference on Sensors, Measurement and Intelligent Materials

Shape memory effect and superelasticity of Ni-free Ti-Nb-based alloys

Authors
Zhengcun Zhou, Dewen Guo, Jie Du, Suyi Gu
Corresponding Author
Zhengcun Zhou
Available Online January 2016.
DOI
https://doi.org/10.2991/icsmim-15.2016.98How to use a DOI?
Keywords
Ni-free Ti-Nb-based alloys, shape memory effect, superelasticity
Abstract

Ni-Free Ti-Nb-based alloys have potential application as non-toxic shape memory and superelastic alloys. The shape memory behavior and superelasticity of free-Ni Ti-Nb-based alloys were described and discussed in this paper. It was shown that the excellent shape memory behavior and superelasticity can be obtained by a reasonable chemical composition and heat treatments. -Ti-Nb alloys undergo a martensitic transformation when the alloys are rapidly cooled from the phase region at high temperatures. This transformation produces , or ,, martensite. The transformation from phase to ,, martensite is a thermoelastic one and thereby produces shape memory effect and superelasticity. The start temperature of martensitic transformation (Ms) decreases with increasing Nb contents. Nb contents are located between 22-26 (at.%) among the reported Ti-Nb alloys since the superelasticity at room temperature exists when the Ti-Nb alloys have the compositions of 22-26at.%Nb. The addition of the elements such as Zr, Sn, O and Al has influences on the shape memory effect and superelasticity of Ti-Nb alloys, which decreases Ms and increases superelasticity. Ti-22Nb-4Zr (at.%) and Ti-24Nb-3Al (at.%) possesses large recovery strain. The maximum recovery strain is 4.3% for the former and 4.7% for the latter, respectively.

Copyright
© 2016, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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Volume Title
Proceedings of the 2015 4th International Conference on Sensors, Measurement and Intelligent Materials
Series
Advances in Computer Science Research
Publication Date
January 2016
ISBN
978-94-6252-157-5
ISSN
2352-538X
DOI
https://doi.org/10.2991/icsmim-15.2016.98How to use a DOI?
Copyright
© 2016, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Cite this article

TY  - CONF
AU  - Zhengcun Zhou
AU  - Dewen Guo
AU  - Jie Du
AU  - Suyi Gu
PY  - 2016/01
DA  - 2016/01
TI  - Shape memory effect and superelasticity of Ni-free Ti-Nb-based alloys
BT  - Proceedings of the 2015 4th International Conference on Sensors, Measurement and Intelligent Materials
PB  - Atlantis Press
SP  - 531
EP  - 536
SN  - 2352-538X
UR  - https://doi.org/10.2991/icsmim-15.2016.98
DO  - https://doi.org/10.2991/icsmim-15.2016.98
ID  - Zhou2016/01
ER  -