HIGH-TEMPERATURE FRICTION AND WEAR BEHAVIOR OF A NI-BASED VALVE ALLOY
| Autor: | Jian-Qiang Li, Yuan-fei Cai, Jia-Huan Chen, Zhiyuan Zhu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Friction coefficient Materials science Metallurgy Alloy chemistry.chemical_element 02 engineering and technology Surfaces and Interfaces engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Surfaces Coatings and Films Superalloy Nickel chemistry Exhaust valve 0103 physical sciences Materials Chemistry engineering 0210 nano-technology |
| Zdroj: | Surface Review and Letters. 26:1950074 |
| ISSN: | 1793-6667 0218-625X |
| Popis: | This study explored the friction and wear behavior of a Ni-based exhaust valve at high temperatures. Nickel-based superalloy was used with two types of processing states: the original forged sample and the sample under the standard T1 heat treatment. At room temperature and a loading force of 10[Formula: see text]N, the average friction coefficient of the T1 heat-treated specimen is 0.61, which was lower than that of the forged sample (0.78). The wear rate of this specimen was also lower than that of the forged sample at the same temperature and loading force. Thus, T1 heat treatment can significantly improve the wear resistance of the alloy because of [Formula: see text] phase and carbides. The wear rate was the minimum at 550∘C and increased again at 750∘C dominated by the formation and flake-off of the oxide film. |
| Databáze: | OpenAIRE |
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