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AuthorCabibbo, M.
AuthorClemente, N.
AuthorEl Mehtedi, M.
AuthorHamouda, A.H.
AuthorMusharavati, F.
AuthorSantecchia, E.
AuthorSpigarelli, S.
Available date2016-01-18T08:29:28Z
Publication Date2015-08-15
Publication NameSurface & Coatings Technology
Identifierhttp://dx.doi.org/10.1016/j.surfcoat.2015.05.024
Citation"Constitutive analysis for the quantification of hardness decay in a superlattice CrN/NbN hard-coating", Cabibbo, M.; Clemente, N.; El Mehtedi, M.; Hamouda, A.H.; Musharavati, F. et al., (2015) Surface and Coatings Technology, vol. 275, p. 155-166
ISSN0257-8972
URIhttp://hdl.handle.net/10576/4098
AbstractIn the present study, a constitutive analysis of the evolution of the mechanical response of a CrN/NbN superlattice coating exposed to high temperature has been performed. Parametric approaches were used to obtain a single master curve describing the experimental data as well as time–temperature–hardness maps to extrapolate the material response. Although the parametric approaches gave an excellent description of the data, an additional effort was devoted to identifying a constitutive equation similar to the power-law function widely used in creep. An excellent description was obtained for a hardness exponent close to 18 and an apparent activation energy ranging from 400 to 500 kJ/mol. Possible micro-mechanisms giving reason for this value of the apparent activation energy were discussed.
SponsorNPRP grant nr. NPRP 5-423-2-167 from the Qatar National Research Fund (a member of Qatar Foundation)
Languageen
PublisherElsevier B.V.
SubjectNanostructured coatings
Nanoindentation
Degradation
Oxidation
Constitutive equations
TitleConstitutive analysis for the quantification of hardness decay in a superlattice CrN/NbN hard-coating
TypeArticle
Pagination155-166
Volume Number275
ESSN1879-3347
dc.accessType Abstract Only


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