This title appears in the Scientific Report :
2011
Please use the identifier:
http://dx.doi.org/10.1007/s11665-011-9854-y in citations.
Mechanical Properties of Highly Porous NiTi Alloys
Mechanical Properties of Highly Porous NiTi Alloys
Highly porous NiTi alloys with pseudoelastic properties are attractive candidates for biomedical implants, energy absorbers, or damping elements. Recently, a new method was developed for net-shape manufacturing of such alloys combining metal injection molding with the application of suitable space-h...
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Personal Name(s): | Bram, M. |
---|---|
Köhl, M. / Buchkremer, H.P. / Stöver, D. | |
Contributing Institute: |
Werkstoffsynthese und Herstellungsverfahren; IEK-1 |
Published in: | Journal of materials engineering and performance, 20 (2011) S. 522 - 528 |
Imprint: |
New York, NY
Springer
2011
|
Physical Description: |
522 - 528 |
DOI: |
10.1007/s11665-011-9854-y |
Document Type: |
Journal Article |
Research Program: |
Rationelle Energieumwandlung |
Series Title: |
Journal of Materials Engineering and Performance
20 |
Subject (ZB): | |
Publikationsportal JuSER |
Highly porous NiTi alloys with pseudoelastic properties are attractive candidates for biomedical implants, energy absorbers, or damping elements. Recently, a new method was developed for net-shape manufacturing of such alloys combining metal injection molding with the application of suitable space-holder materials. A comprehensive study of mechanical properties was conducted on samples with a porosity of 51% and a pore size in the range of 300-500 mu m. At low deformations < 6%, fully pronounced pseudoelasticity was found. Even at higher strains, a shape recovery of maximum 6% took place, on which the onset of irreversible plastic deformation was superposed. Results of static compression tests were also used to calculate the energy-absorbing capacity. Fatigue of porous NiTi was investigated by cyclic loading up to 230,000 stress reversals. The failure mechanisms responsible for a reduction of shape recovery after an increased number of load cycles are discussed. |