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The paper discusses the phenomenological model of cavitation erosion devised for MCrAly and NiCrMoNbTa. According to ASTM G32 results, MCrAlYs have a 50% maximum erosion rate and twice lower CE resistance than NiCrMoNbTa coatings, with a 50 percent maximum erosion rate and twice lower CE resistance. Both types of coatings damage is triggered by loosening loose splats, cracking at the border splats, peeling off the coating layer, and pitting. The brittle version of MCrAlYs' CE process was dominated by the brittle method, but the NiCrMoNbTa coating has more ductile damage characteristics.
Source link: https://doi.org/10.5604/01.3001.0015.8368
A remelting process was applied to surfaces for refinement of the layers' morphology and enhancement of the coating/substrate adhesion. The addition of 15 wt. % WC-12Co to the self-fluxing alloy increases the resistance to cavitation erosion without affecting the NaCl's excellent corrosion resistance. One may conclude that NiCrBSi/WC-Co composite coatings are able to extend the life cycle of expensive, high-performance coatings exposed to extreme cavitation conditions, based on the latest experimental findings.
Source link: https://doi.org/10.3390/ma15082943
Depending on the carbon content in the coating, an experimental experiment was carried out of the procedure of cavitation destruction of Cr1 8 Ni1 0 Ti stainless steel samples with Cr-C thick coatings. Compared to other coated samples and the reference samples, the Cr-C samples coated with 28. 8 at % carbon content showed less surface damage than those coated samples and the reference samples.
Source link: https://doi.org/10.1088/1742-6596/2240/1/012012
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