期刊
NANOMATERIALS
卷 12, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/nano12081312
关键词
micro-impact fatigue; wear hard coatings; study state cutting; fractal analysis
类别
资金
- Russian Science Foundation [21-79-10044]
- Natural Sciences and Engineering Research Council of Canada NSERC [NETGP 479639-15]
- Russian Science Foundation [21-79-10044] Funding Source: Russian Science Foundation
The micromechanism of low-cycle fatigue of mono- and multilayer PVD coatings on cutting tools was investigated, showing that the multilayer nanolaminate (TiAlCrSiY)N/(TiAlCr)N has higher fracture toughness compared to the single layer coating.
The micromechanism of the low-cycle fatigue of mono- and multilayer PVD coatings on cutting tools was investigated. Multilayer nanolaminate (TiAlCrSiY)N/(TiAlCr)N and monolayer (TiAlCrSiY)N PVD coatings were deposited on the cemented carbide ball nose end mills. Low-cycle fatigue resistance was studied using the cyclic nanoindentation technique. The obtained results were compared with the behaviour of the polycrystalline silicon reference sample. The fractal analysis of time-resolved curves for indenter penetration depth demonstrated regularities of damage accumulation in the coatings at the early stage of wear. The difference in low-cycle fatigue of the brittle silicon and nitride wear-resistant coatings is shown. It is demonstrated that when distinguished from the single layer (TiAlCrSiY)N coating, the nucleation and growth of microcracks in the multilayer (TiAlCrSiY)N/(TiAlCr)N coating is accompanied by acts of microplastic deformation providing a higher fracture toughness of the multilayer nanolaminate (TiAlCrSiY)N/(TiAlCr)N.
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