Investigation of the superelastic behavior of a Ti-16Zr-13Nb-2Sn sputtered film by nanoindentation

Article dans une revue avec comité de lecture
Auteur
ZHOU, Y.
105160 Université de Rennes [UR]
FILLON, A.
117606 Institut National des Sciences Appliquées - Rennes [INSA Rennes]
LAILLÉ, D.
194938 Institut des Sciences Chimiques de Rennes [ISCR]
GLORIANT, T.
194938 Institut des Sciences Chimiques de Rennes [ISCR]

URI
http://hdl.handle.net/10985/20095
DOI
10.1016/j.surfcoat.2020.126690
Date
2021
Journal
Surface and Coatings Technology

Résumé

A new Ti-16Zr-13Nb-2Sn superelastic film incorporating beta-stabilizing and highly biocompatible elements was elaborated by magnetron sputtering. The morphological, crystallographic and microstructural characteristics of the obtained films were studied by scanning electron microscopy, atomic force microscopy, X-ray diffraction, and transmission electron microscopy. Superelastic response of the film was investigated at local scale by nano-indentation using both spherical and Berkovich indenters. The sputter-deposited film revealed nanograined beta microstructure with preferential growth orientation along [110] direction and excellent superelastic recovery at room temperature. Special attention was paid to the indenter geometry influencing reliable evaluation of the superelastic nature of the film. Evolution of the deformation mechanisms during nanoindentation at increasing depths was rationalized by the calculated representative strain beneath the indenting tips and is discussed in this work.

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