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

Mohsen Taheri Andani, Soheil Saedi, Ali Sadi Turabi, M. R. Karamooz, Christoph Haberland, Haluk Ersin Karaca, Mohammad Elahinia

Research output: Contribution to journalArticlepeer-review

95 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)224-231
Number of pages8
JournalJournal of the Mechanical Behavior of Biomedical Materials
Volume68
DOIs
StatePublished - Apr 1 2017

Bibliographical note

Publisher Copyright:
© 2017 Elsevier Ltd

Keywords

  • Additive manufacturing
  • Cyclic test of NiTi
  • NiTi
  • Plastic strain
  • Porous implant
  • Selective laser melting
  • Shape memory alloy
  • Stress shielding

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering
  • Mechanics of Materials

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