| EPSRC Reference: |
GR/K65676/01 |
| Title: |
THE POWDER METALLURGICAL PROCESSING OF NITI SHAPE MEMORY ALLOYS |
| Principal Investigator: |
Grant, Professor DM |
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| Department: |
Sch of Mech Materials Manuf Eng Mgt |
| Organisation: |
University of Nottingham |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 October 1995 |
Ends: |
30 June 1999 |
Value (£): |
136,572
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Summary on Grant Application Form |
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Near equiatomic nickel-titanium (Ni-Ti), has provided a large amount of scientific and commercial interest since the discovery of its shape memory behaviour with wrought material exhibiting up to 8% recoverable plastic strain. The alloy possesses an unusual combination of physical and mechanical properties in addition to the shape memory behaviour and is ductile at room temperature, with elongations of up to 16% possible. Furthermore, Ni-Ti shows good impact and corrosion resistance, which can be enhanced by surface treatment, and possesses biocompatibility. The production of near net shape bulk Ni-Ti, via a powder processing route, that is capable of exhibiting similar shape memory behaviour to that found in wrought alloy, is the objective of the proposed programme of research. This will be achieved by using mechanical alloying to first obtain an amorphous, homogeneous Ni-Ti powder mixture followed by compaction and solid state annealing and diffusion, avoiding liquid formation entirely. This novel processing route would offer technological advantages over the traditional vacuum casting routes to Ni-Ti production. Such a processes would provide a UK source of Ni-Ti shape memory alloy where currently all wrought Ni-Ti is either of American, Japanese or European origin. The ability to produce shape memory effect porous Ni-Ti combined with anticipated biocompatibility and corrosion resistance would be of much technological use: from applications involving replacing machined components such as jointing collars and hydraulic couplings to medical applications involving surgical instruments and prosthesis for both invasive and minimally invasive techniques.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.nottingham.ac.uk |