Segregation of niobium in laser cladding Inconel 718 superalloy
| Autor: | Yi-tong Long, Xiang Li, Zhu-guo Li, Pu-lin Nie, Jian Huang, Xin-mei Xu |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Metallurgy Alloy Metals and Alloys Niobium chemistry.chemical_element 02 engineering and technology engineering.material Laves phase 021001 nanoscience & nanotechnology Geotechnical Engineering and Engineering Geology Condensed Matter Physics Microstructure 01 natural sciences Superalloy Coating chemistry Phase (matter) 0103 physical sciences Materials Chemistry engineering 0210 nano-technology Inconel |
| Zdroj: | Transactions of Nonferrous Metals Society of China. 26:431-436 |
| ISSN: | 1003-6326 |
| DOI: | 10.1016/s1003-6326(16)64131-6 |
| Popis: | Inconel 718 superalloy is widely used in the aerospace and turbine industry. Segregation of niobium appears in the laser cladding Inconel 718 superalloy and consequently influences the phase transformation during the rapid solidification. In order to control the microstructure and improve the mechanical properties of the deposited coating, the the influence of solidification conditions on the segregation of niobium and the resultant formation of Nb-rich Laves phase was studied using the microstructure observation and EDS analysis. The results show that the cooling rate has considerable influence on the microstructure of the deposited coating. High cooling rate is beneficial for suppressing the segregation of Nb and reducing the formation of Laves phase, which is believed to be detrimental to the performance of the Inconel 718 alloy. |
| Databáze: | OpenAIRE |
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