Abstract
Scratch tests were performed to study failure mechanisms in TiAlN coatings deposited on substrates from steel 12Cr18Ni9Ti. It is shown that coating failure begins with crack generation at the apices of pile-ups formed along the scratch due to plastic ploughing of the substrate material. With further increase in indentation load the failure process is governed by the competition between tensile stresses behind the indenter arising due to friction force and stresses at the contact area periphery due to coating bending under normal load. Substrate pretreatment by Ti ion beams is shown to simultaneously increase the hardness and crack resistance of TiAlN coatings.
| Original language | English |
|---|---|
| Pages (from-to) | 185-192 |
| Number of pages | 8 |
| Journal | Physical Mesomechanics |
| Volume | 20 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1 Apr 2017 |
Keywords
- crack resistance
- deformation and failure
- hard coatings
- local surface curvature
- scratch testing
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Surfaces and Interfaces
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Cite this
Shugurov, A. R., Akulinkin, A. A., Panin, A. V., Sergeev, V. P., Kalashnikov, M. P., Voronov, A. V., & Cheng, C. H. (2017). Study of crack resistance of TiAlN coatings by scratch testing. Physical Mesomechanics, 20(2), 185-192. https://doi.org/10.1134/S1029959917020084