Austenite-martensite phase transformation of biomedical Nitinol by ball burnishing

C. H. Fu, M. P. Sealy, Y. B. Guo, X. T. Wei

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

Nitinol has received considerable attention for biomedical and aerospace applications due to its shape memory and superelastic properties. Shape memory and superelasticity are induced in Nitinol by transforming austenite into martensite. Austenite can transform to martensite by applying stress or heat. One promising method to initiate a stress induced phase transformation is ball burnishing. In this study, phase transformation of Nitinol (Ni 50.8Ti49.2) (at.%) by ball burnishing at various forces was investigated. Burnishing tracks were characterized and microstructures in the subsurface were investigated. Also, a corresponding burnishing simulation was performed to gain insight into the phase transformation mechanism of Nitinol by burnishing.

Original languageEnglish (US)
Pages (from-to)3122-3130
Number of pages9
JournalJournal of Materials Processing Technology
Volume214
Issue number12
DOIs
StatePublished - Dec 2014

Keywords

  • Burnishing
  • Medical device
  • Nitinol
  • Phase transformation
  • Surface integrity

ASJC Scopus subject areas

  • Ceramics and Composites
  • Computer Science Applications
  • Metals and Alloys
  • Industrial and Manufacturing Engineering

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