Mechanical and shape memory properties of porous Ni50.1Ti49.9 alloys manufactured by selective laser melting

Near equiatomic NiTi shape memory alloys were fabricated in dense and designed porous forms by Selective Laser Melting (SLM) and their mechanical and shape memory properties were systematically characterized. Particularly, the effects of pore morphology on their mechanical responses were investigate...

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Bibliographic Details
Published in:Journal of the mechanical behavior of biomedical materials 2017-04, Vol.68, p.224-231
Main Authors: Taheri Andani, Mohsen, Saedi, Soheil, Turabi, Ali Sadi, Karamooz, M.R., Haberland, Christoph, Karaca, Haluk Ersin, Elahinia, Mohammad
Format: Article
Language:English
Subjects:
Additive manufacturing
Cyclic test of NiTi
NiTi
Plastic strain
Porous implant
Selective laser melting
Shape memory alloy
Stress shielding
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Summary:Near equiatomic NiTi shape memory alloys were fabricated in dense and designed porous forms by Selective Laser Melting (SLM) and their mechanical and shape memory properties were systematically characterized. Particularly, the effects of pore morphology on their mechanical responses were investigated. Dense and porous NiTi alloys exhibited good shape memory effect with a recoverable strain of about 5% and functional stability after eight cycles of compression. The stiffness and residual plastic strain of porous NiTi were found to depend highly on the pore shape and the level of porosity. Since porous NiTi structures have lower elastic modulus and density than dense NiTi with still good shape memory properties, they are promising materials for lightweight structures, energy absorbers, and biomedical implants.
ISSN:1751-6161
1878-0180
DOI:10.1016/j.jmbbm.2017.01.047