Damping of selective-laser-melted NiTi for medical implants
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Authors
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Publication date
2014
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01A - Journal article
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Parent work
Journal of Materials Engineering and Performance
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Volume
23
Issue / Number
7
Pages / Duration
2614-19
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Springer
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Abstract
NiTi exhibits distinct damping properties associated with the martensite-austenite transformation. We
fabricated net-shape NiTi parts layer-by-layer using a laser beam that locally melted the NiTi powder. The damping properties of such NiTi parts were analyzed by the decay of cantilever vibrations in comparison to conventionally prepared NiTi. The dynamic modulus as a function of the temperature was derived from the resonant frequency. We found that the two cantilevers showed a damping ratio of about 0.03 at temperatures below austenite start, maximal values of up to 0.04 in the transformation regions and low values of about 0.005 above austenite finish. The results indicate that selective-laser-melted NiTi qualifies for the fabrication of shock-absorbing medical implants in the same manner than conventionally produced NiTi.
Keywords
damping, nondestructive testing, NiTi, powder metallurgy, selective laser melting
Subject (DDC)
660 - Technische Chemie
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ISBN
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1544-1024
1059-9495
1059-9495
Language
English
Created during FHNW affiliation
Yes
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Publication status
Published
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Peer review of the complete publication
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Citation
DE WILD, Michael, Fabian MEIER, Therese BORMANN, Chaim HOWALD und Bert MÜLLER, 2014. Damping of selective-laser-melted NiTi for medical implants. Journal of Materials Engineering and Performance. 2014. Bd. 23, Nr. 7, S. 2614–19. DOI 10.1007/s11665-014-0889-8. Verfügbar unter: http://hdl.handle.net/11654/10111