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Study on crack behavior of laser cladding ceramic-metal composite coating with high content of WC.
- Source :
-
Ceramics International . Jun2022, Vol. 48 Issue 12, p17460-17470. 11p. - Publication Year :
- 2022
-
Abstract
- The purpose of this work is to investigate the cracking behavior and crack formation mechanism of high WC wt% composite coatings. Three NiCrSiBC-WC composite coatings with respective WC wt% of 40%, 50%, 60% were prepared on carbon steel substrates by laser. The macro- and micro-morphologies together with phase compositions of three coatings were comparatively observed. Further, the hardness, residual stress and toughness values of three coatings were tested and calculated quantitatively to get a clear understanding of crack formation. As a result, cracks occurred in 50% and 60%WC coatings but not being found in 40%WC coating. With increasing WC wt%, grains were more refined while more cracks occurred. The cracking of 50%WC coating was attributed to high tensile residual stress coupled with low toughness. Whereas compared with 50%WC coating, the higher crack susceptibility of 60%WC coating was mainly because of further increased residual stress. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 48
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 156632697
- Full Text :
- https://doi.org/10.1016/j.ceramint.2022.03.010