Deformation mechanism of CrN/nitriding coated steel in wear and nano-scratch experiments under heavy loading conditions

Yongguang Wang, Yao Chen, Dong Zhao*, Xiaolong Lu, Weiwei Liu, Fei Qi, Yang Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

CrN coatings are widely used to protect metals from wear in industrial engineering. However, fundamental deformation mechanism of these coatings under heavy loading conditions remains elusive. In this paper, multilayered hard coatings with a CrN matrix and a supporting layer were developed by means of the hybrid deposition process combined with PVD and ionicnitriding. The tribological behavior of coatings with and without ionicnitriding were investigated by a pin-on-disk arrangement under heavy loading conditions. In addition, the deformation mechanism of the multilayered hard coatings was studied by nano-scratch experiment with ramp load model, which has not been discussed previously. It was found that the deformation process of coatings could be divided into three regimes based on the evolution of frictional coefficient. The insertion of nitriding films leads to the further increase in frictional resistance owing to the elastic-plastic deformation. The results and analysis reveal some insights into the coating design for multilayered hard coatings with the consideration of deformation mechanisms.

Original languageEnglish
Pages (from-to)100-106
Number of pages7
JournalApplied Surface Science
Volume447
DOIs
Publication statusPublished - 31 Jul 2018
Externally publishedYes

Keywords

  • CrN
  • Deformation mechanism
  • Nitriding
  • Wear

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