Thermomechanical characterization of Ni-rich NiTi fabricated by selective laser melting

Soheil Saedi, Ali Sadi Turabi, Mohsen Taheri Andani, Christoph Haberland, Mohammad Elahinia, Haluk Karaca

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

This study presents the shape memory behavior of as-fabricated and solution annealed Ni50.8Ti49.2 alloys fabricated using the selective laser melting (SLM) technique. Results were compared to the initial ingot that was used to fabricate powders. Optical microscopy was employed to reveal the microstructure. The shape memory effect under constant compressive stress and isothermal compressive stress cycling tests were utilized to investigate the shape memory characteristics of the initial ingot and fabricated alloys. It was revealed that the SLM method and post heat treatments can be used to tailor the microstructure and shape memory response. Partial superelasticity was observed after the SLM process. Solutionizing the fabricated samples increased the strength and improved the superelasticity but slightly decreased the recoverable strain.

Original languageEnglish
Article number035005
JournalSmart Materials and Structures
Volume25
Issue number3
DOIs
StatePublished - Feb 8 2016

Bibliographical note

Publisher Copyright:
© 2016 IOP Publishing Ltd.

Keywords

  • additive manufacturing
  • selective laser melting
  • shape memory alloys

ASJC Scopus subject areas

  • Signal Processing
  • Civil and Structural Engineering
  • Atomic and Molecular Physics, and Optics
  • Materials Science (all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering

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