Additive manufacturing of NiTiHf high temperature shape memory alloy

Mohammad Elahinia, Narges Shayesteh Moghaddam, Amirhesam Amerinatanzi, Soheil Saedi, Guher Pelin Toker, Haluk Karaca, Glen S. Bigelow, Othmane Benafan

Research output: Contribution to journalArticlepeer-review

108 Scopus citations

Abstract

A NiTi-20Hf high temperature shape memory alloy (HTSMA) was additively manufactured by selective laser melting (SLM) technique using NiTiHf powder. The thermomechanical and shape memory response were compared to the conventional vacuum induction skull melted counterpart. Transformation temperatures of the SLM material were found to be above 200 °C and slightly lower due to the additional oxygen pick up from the gas atomization and melting process. The shape memory response in compression was measured for stresses up to 500 MPa, and transformation strains were found to be very comparable (up to 1.26% for as-extruded; up to 1.52% for SLM).

Original languageEnglish
Pages (from-to)90-94
Number of pages5
JournalScripta Materialia
Volume145
DOIs
StatePublished - Mar 1 2018

Bibliographical note

Publisher Copyright:
© 2017 Acta Materialia Inc.

Keywords

  • Actuators
  • Additive manufacturing
  • High temperature shape memory alloys
  • NiTiHf

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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