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Design of a new biocompatible ti-based shape memory alloy and its superelastic deformation behaviour

Xiong, Jianyu, Li, Yuncang, Hodgson, Peter and Wen, Cui'e 2010, Design of a new biocompatible ti-based shape memory alloy and its superelastic deformation behaviour, Materials science forum, vol. 654-656, pp. 2087-2090, doi: 10.4028/www.scientific.net/MSF.654-656.2087.

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Title Design of a new biocompatible ti-based shape memory alloy and its superelastic deformation behaviour
Author(s) Xiong, Jianyu
Li, Yuncang
Hodgson, Peter
Wen, Cui'e
Journal name Materials science forum
Volume number 654-656
Start page 2087
End page 2090
Total pages 4
Publisher Trans Tech Publications
Place of publication Stafa-Zurich, Switzerland
Publication date 2010-06-30
ISSN 0255-5476
1422-6375
Keyword(s) nickel-free
titanium alloy
shape memory alloy
design
superelasticity
Summary Titanium-nickel (Ti-Ni) shape memory alloys have been widely used for biomedical applications in recent years. However, it is reported that Ni is allergic and possibly carcinogenic for the human body. Therefore, it is desirable to develop new Ni-free Ti-based shape memory alloys for biomedical applications. In the present study, a new Ti-18Nb-5Mo-5Sn (wt.%) alloy, containing only biocompatible alloying elements, was designed with the aid of molecular orbital method and produced by vacuum arc melting. Both β and α″ martensitic phases were found to coexist in the alloy after ice-water quenching, indicating the martensitic transformation. The phase transformation temperatures of the Ti-18Nb-5Mo-5Sn alloy were Ms = 7.3 °C, Mf = −31.0 °C, As = 9.9 °C, and Af = 54.8 °C. Superelasticity was observed in the alloy at a temperature higher than the Af temperature. A totally recovered strain of 3.5 % was achieved for the newly designed Ti-based shape memory alloy with a pre-strain of 4 %.
Language eng
DOI 10.4028/www.scientific.net/MSF.654-656.2087
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 861299 Fabricated Metal Products not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2010
Copyright notice ©(2010), Trans Tech Publications, Switzerland
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030450

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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Created: Tue, 12 Oct 2010, 11:30:43 EST by Sandra Dunoon

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