Kovalev Anatoly I, Vakhrushev Vladimir O, Beake Ben D, Konovalov Egor P, Wainstein Dmitry L, Dmitrievskii Stanislav A, Fox-Rabinovich German S, Veldhuis Stephen
State Scientific Centre, I.P. Bardin Central Research Institute for Ferrous Metallurgy, 23/9 bdg, 2, Radio Str., 105005 Moscow, Russia.
Surface Phenomena Researches Group, LLC, Staropimenovsky Lane, 6, bdg. 1, off. 4, 127006 Moscow, Russia.
Nanomaterials (Basel). 2022 Apr 11;12(8):1312. doi: 10.3390/nano12081312.
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.
研究了切削刀具上单层和多层物理气相沉积（PVD）涂层的低周疲劳微观机制。在硬质合金球头立铣刀上沉积了多层纳米层状结构（TiAlCrSiY）N/（TiAlCr）N和单层（TiAlCrSiY）N物理气相沉积涂层。使用循环纳米压痕技术研究了低周疲劳抗力。将所得结果与多晶硅参考样品的行为进行了比较。对压头穿透深度的时间分辨曲线进行分形分析，揭示了涂层在磨损早期损伤积累的规律。展示了脆性硅和氮化物耐磨涂层在低周疲劳方面的差异。结果表明，与单层（TiAlCrSiY）N涂层不同，多层（TiAlCrSiY）N/（TiAlCr）N涂层中微裂纹的形核和扩展伴随着微塑性变形行为，这使得多层纳米层状结构（TiAlCrSiY）N/（TiAlCr）N具有更高的断裂韧性。
