Shape recovery and stress-induced martensite in TiNi following indentation and wear loading

W. Ni, Y. T. Cheng, D. S. Grummon

Research output: Contribution to journalConference articlepeer-review

7 Scopus citations


We present initial findings that are suggestive of the potential for shape-memory and superelastic NiTi alloys to function as useful tribological materials. For example, surface-deformation made with a spherical indenter is found to be almost completely recoverable by the shape-memory effect. A similar form of strain recovery is shown to be possible in thin films and in wear-track profiles. When a martensitic material is subjected to pin-on-disk loading, a substantial fraction of the wear track cross-section can be recovered by heating. It is also shown that the martensite phase can be stress-induced in response to complex loading associated either indentation or pin-on-disk wear tests, indicating that transformational superelasticity may be able to ameliorate wear degradation in the same way that it can limit low-cycle fatigue damage accumulation. Since NiTi can readily be deployed as a sputtered thin film coating, it may be possible to confer these beneficial effects to base metal substrates such as aluminum.

Original languageEnglish
Pages (from-to)1147-1150
Number of pages4
JournalJournal De Physique. IV : JP
Volume112 II
StatePublished - Oct 2003
EventInternational Conference on Martensitic Transformations - Espoo, Finland
Duration: Jun 10 2002Jun 14 2002

ASJC Scopus subject areas

  • General Physics and Astronomy


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