Influence of Low Energy Density Laser Re-Melting on the Properties of Cold Sprayed FeCoCrMoBCY Amorphous Alloy Coatings
| Autor: | Bojiang Ma, Xudong Sui, Guosheng Huang, Chao Han, Li Ma |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
02 engineering and technology cold spraying engineering.material wear resistance 01 natural sciences Corrosion law.invention Coating Residual stress law 0103 physical sciences Materials Chemistry Salt spray test Composite material Porosity 010302 applied physics corrosion resistance Amorphous metal Surfaces and Interfaces Engineering (General). Civil engineering (General) 021001 nanoscience & nanotechnology Laser Surfaces Coatings and Films Galvanic corrosion engineering TA1-2040 laser re-melting amorphous alloy coating 0210 nano-technology |
| Zdroj: | Coatings, Vol 11, Iss 695, p 695 (2021) Coatings Volume 11 Issue 6 |
| ISSN: | 2079-6412 |
| DOI: | 10.3390/coatings11060695 |
| Popis: | Fe-based amorphous alloys (FAA) have excellent anti-corrosion and anti-abrasive comprehensive performances. However, sprayed thin FAA coatings with high porosity cannot provide efficient protection, or even accelerate the corrosion rate of the substrate due to galvanic corrosion. Laser re-melting densifying is usually used to improve the anti-corrosion performance of sprayed coatings. There are two disadvantages of the common laser re-melting method, including crystallization and residual stress. In the present paper, a low density energy laser re-melting method was used to improve the performance of cold spraying (CS) FeCoCrMoBCY FAA coating on 40Cr substrate. The results show that the CS FAA coatings were crystallized partially during the melting process. The hardness of the coating is improved at the melting zone after laser re-melting, which improves the anti-abrasive performance. Potentiodynamic test results show that laser re-melting can decrease the corrosion rate, but the salt spray test indicates that low energy density re-melting cannot eliminate penetrated diffusion passage. Further optimization should be conducted to improve the anticorrosion performance for this method. |
| Databáze: | OpenAIRE |
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