High-temperature superelasticity of Ni50.6Ti24.4Hf25.0 shape memory alloy

Luca Patriarca, Huseyin Sehitoglu

Research output: Contribution to journalArticlepeer-review

Abstract

Changes in transformation temperatures and high-temperature mechanical behavior of the new Ni50.6Ti34.4Hf25.0 alloy were determined after selected aging treatments. Differential scanning calorimetry was used to compare the homogenized, solution-treated and aged specimens for a wide combination of aging temperatures and times. Isothermal deformation experiments were conducted measuring reversible transformation strains with digital image correlation. Extraordinary superelasticity was found at test temperatures up to 300 °C for the specimen aged at 500 °C for 4 h.

Original languageEnglish (US)
Pages (from-to)12-15
Number of pages4
JournalScripta Materialia
Volume101
DOIs
StatePublished - May 1 2015

Keywords

  • Differential scanning calorimetry
  • Digital image correlation
  • Pseudoelasticity
  • Shape memory

ASJC Scopus subject areas

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

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