Cyclic nanoindentation and nano-impact fatigue mechanisms of functionally graded TiN/TiNi film

Simple item page
dc.contributor.authorFaisal, N. H.
dc.contributor.authorPrathuru, Anil K.
dc.contributor.authorGoel, Saurav
dc.contributor.authorAhmed, R.
dc.contributor.authorDroubi, M. G.
dc.contributor.authorBeake, Ben D.
dc.contributor.authorFu, Y. Q.
dc.date.accessioned2017-04-07T11:21:25Z
dc.date.available2017-04-07T11:21:25Z
dc.date.issued2017-03-09
dc.description.abstractThe mechanisms of nanoscale fatigue of functionally graded TiN/TiNi films have been studied using multiple-loading cycle nanoindentation and nano-impact tests. The functionally graded films were sputter deposited onto silicon substrates, in which the TiNi film provides pseudo-elasticity and shape memory behaviour, while a top TiN surface layer provides tribological and anti-corrosion properties. Nanomechanical tests were performed to investigate the localised film performance and failure modes of the functionally graded film using both Berkovich and conical indenters with loads between 100 μN and 500 mN. The loading history was critical to define film failure modes (i.e. backward depth deviation) and the pseudo-elastic/shape memory effect of the functionally graded layer. The results were sensitive to the applied load, loading mode (e.g. semi-static, dynamic) and probe geometry. Based on indentation force–depth profiles, depth–time data and post-test surface observations of films, it was concluded that the shape of the indenter is critical to induce localised indentation stress and film failure, and generation of pseudo-elasticity at a lower load range. Finite-element simulation of the elastic loading process indicated that the location of subsurface maximum stress near the interface influences the backward depth deviation type of film failure.en_UK
dc.identifier.citationN. H. Faisal, Anil K. Prathuru, Saurav Goel, R. Ahmed, M. G. Droubi, B. D. Beake, Y. Q. Fu. (2017) Cyclic nanoindentation and nano-impact fatigue mechanisms of functionally graded TiN/TiNi film. Shape Memory and Superelasticity. Vol 3. Iss 2. March 2017, pp.149-167en_UK
dc.identifier.issn2199-384X
dc.identifier.urihttp://dx.doi.org/10.1007/s40830-017-0099-y
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/11755
dc.language.isoenen_UK
dc.publisherSpringeren_UK
dc.rightsAttribution 4.0 International (CC BY 4.0) You are free to: Share — copy and redistribute the material in any medium or format, Adapt — remix, transform, and build upon the material for any purpose, even commercially. The licensor cannot revoke these freedoms as long as you follow the license terms. Under the following terms: Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. Information: No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
dc.subjectNitinolen_UK
dc.subjectShape memory alloysen_UK
dc.subjectBiomedicalen_UK
dc.subjectMultiple-loading cycle nanoindentationen_UK
dc.subjectNano-impact (fatigue)en_UK
dc.titleCyclic nanoindentation and nano-impact fatigue mechanisms of functionally graded TiN/TiNi filmen_UK
dc.typeArticleen_UK

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Cyclic_nanoindentation_and_nano-impact_fatigue_mechanisms-2017.pdf
Size:
4.17 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.79 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Staff publications (SATM)