Effect of thermal annealing upon residual stress and mechanical properties of nanostructured TiSiN coatings on steel substrates

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dc.contributor.authorAhmed, M.
dc.contributor.authorZhao, X.
dc.contributor.authorZhou, Z.
dc.contributor.authorMunroe, P.
dc.contributor.authorChen-Tan, N.
dc.contributor.authorLi, L.
dc.contributor.authorXie, Z.
dc.date.issued2011
dc.description.abstractNanostructured TiSiN coatings were deposited onto a tool steel substrate. The coated samples were then annealed under vacuum at temperatures ranging from 4001 to 9001C. Both mechanical properties and residual stresses in the coatings were determined using nanoindentation methods, assisted by finite element analysis. Intrinsic residual stress was found to be dominant in the as-deposited coatings, but decreased with the increased annealing temperature. In contrast, thermal annealing has little impact on either the Young’s modulus or hardness of the coatings at temperatures up to 8001C. Grazing incidence X-ray diffraction analysis indicated that stress relaxation occurred in nanocrystalline TiN grains during thermal annealing. Direct subsurface observation, enabled by focused ion beam microscopy, revealed that microstructural characteristics, responsible for both the Young’s modulus and hardness of the coatings remained unaffected during thermal annealing. The degradation of mechanical properties for the coatings annealed at 9001C resulted primarily from the formation of a thin, soft titanium oxide layer at the outer surface.
dc.description.statementofresponsibilityAhmed, Mohammad Shoeb ; Zhao, Xiaoli ; Zhou, Zhi - Feng ; Munroe, Paul ; Chen - Tan, Nigel ; Li, Lawrence Kwok Yan ; Xie, Zonghan
dc.identifier.citationJournal of the American Ceramic Society, 2011; 94(5):1546-1551
dc.identifier.doi10.1111/j.1551-2916.2010.04280.x
dc.identifier.issn0002-7820
dc.identifier.issn1551-2916
dc.identifier.urihttp://hdl.handle.net/2440/75875
dc.language.isoen
dc.publisherAmer Ceramic Soc
dc.rights© 2010 The American Ceramic Society
dc.source.urihttps://doi.org/10.1111/j.1551-2916.2010.04280.x
dc.titleEffect of thermal annealing upon residual stress and mechanical properties of nanostructured TiSiN coatings on steel substrates
dc.typeJournal article
pubs.publication-statusPublished

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