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Shape Memory
Technology SFB 459
Special Research Center funded by German Research
Foundation  |
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| General information on project C2 |
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| Subject: |
| Powder Metallurgy of Shape Memory
Alloys |
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| Field of investigation: |
| Powder metallurgy |
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| Principal Investigators: |
| Prof. Dr. rer. nat. Detlev Stöver
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| Telephone: (0234) 32-25912, (02461)
61-4010 |
| FAX: (0234) 32-14235, (02461)
61-8210 |
| email: stoever@wwsg1.ww.ruhr-uni-bochum.de
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| email: d.stoever@fz-juelich.de |
| web: http://www.fz-juelich.de
(project description) |
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| Dr.-Ing. Hans Peter Buchkremer |
| Telephone: (02461) 61 4062 |
| FAX: (02461) 61-2455 |
| email: h.p.buchkremer@fz-juelich.de |
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| Address: |
Forschungszentrum Jülich GmbH
Institut für Werkstoffe und Verfahren
der Energietechnik
IWV1: Werkstoffsynthese und
Herstellungsverfahren
52425 Jülich |
| Summary/Abstract |
The aim of this project is the
research and development of
near-net-shape processes for the
fabrication of structu ral parts and
components of shape memory alloys (SMAs)
of the NiTi system by powder metallurgy.
Powder metallurgy provides the
possibility of a material-saving and
automated fabrication of semi-finished
products and components. Moreover, NiTi
coatings are being developed, for
example, as wear-resistant coatings. The
following fabrication methods are being
examined:
-Reaction Sintering (RS) for fabrication
of porous shaped bodies
-Hot Isostatic Pressing (HIP) for
fabrication of dense shaped bodies
-Metal Injection Moulding (MIM) for
fabrication of components with
complicated geometry
-Wet Powder Spraying (WPS) for production
of porous coatings
-Vacuum Plasma Spraying (VPS) for
production of dense and porous coatings
The starting materials used are
prealloyed powders as well as elemental
powder mixtures. Thermal, mechanical or
thermomechanical post treatments of
components and coatings are required in
order to establish defined shape memory
properties. The properties achieved are
discussed in direct comparison wi th SMAs
produced by melting metallurgy. Above
all, the reproducibility of the shape
memory properties plays a decisive role.
A correlation between the microstructure,
the macroscopic properties and the
fabrication process represents an
important aspect for cooperation with
other SFB-459 project partners. These
correlations provide information about
the performance potential of
near-net-shape fabrication techniques for
shape memory alloys.
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