This title appears in the Scientific Report :
2011
Please use the identifier:
http://dx.doi.org/10.1016/j.msea.2010.11.055 in citations.
Characterization of porous, net-shaped NiTi alloy regarding its damping and energy-absorbing capacity
Characterization of porous, net-shaped NiTi alloy regarding its damping and energy-absorbing capacity
Porous NiTi alloys are highly attractive for energy absorbers, damping devices and biomedical implants. In the present work, metal injection moulding (MIM) in combination with the application of a suitable space holder material was used for the production of NiTi parts with well defined pore sizes a...
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Personal Name(s): | Köhl, M. |
---|---|
Bram, M. / Moser, A. / Buchkremer, H.P. / Beck, T. / Stöver, D. | |
Contributing Institute: |
Werkstoffsynthese und Herstellungsverfahren; IEK-1 |
Published in: | Materials science and engineering / A, 528 (2011) S. 2454 - 2462 |
Imprint: |
Amsterdam
Elsevier
2011
|
Physical Description: |
2454 - 2462 |
DOI: |
10.1016/j.msea.2010.11.055 |
Document Type: |
Journal Article |
Research Program: |
Rationelle Energieumwandlung |
Series Title: |
Materials Science and Engineering A
528 |
Subject (ZB): | |
Publikationsportal JuSER |
Porous NiTi alloys are highly attractive for energy absorbers, damping devices and biomedical implants. In the present work, metal injection moulding (MIM) in combination with the application of a suitable space holder material was used for the production of NiTi parts with well defined pore sizes and porosities in the range of 30-70 vol.%. For comparing the properties, porous titanium and Ti-6Al-4V samples were prepared in the same manner.Focus of the present work was a detailed investigation of the mechanical properties of porous NiTi to estimate its potential regarding the abovementioned applications. For a Ni-rich NiTi alloy with a porosity of 50 vol.%, fully pronounced pseudoelasticity after 6% compression was demonstrated. An energy dissipation of 1.5 MJ/m(3) was measured, which could be directly related to the reversible austenite-martensite phase transformation. At higher deformations, pseudoelasticity becomes more and more superposed by the onset of plastic deformation. Nevertheless, even at deformations of up to 50%, a clearly pronounced amount of pseudoelastic shape recovery still remained. Fatigue of pseudoelasticity was investigated by conducting of up to 230,000 load cycles to 4% compression at a frequency of 1 Hz. (C) 2010 Elsevier B.V. All rights reserved. |