Tribological behavior of friction stir processed SiP/ZA40 in-situ composites
| Autor: | Reza Taghiabadi, F. Rajabi, M.H. Shaeri |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
In situ Friction stir processing Materials science Composite number Metals and Alloys 02 engineering and technology Substrate (electronics) Tribology 021001 nanoscience & nanotechnology Geotechnical Engineering and Engineering Geology Condensed Matter Physics 01 natural sciences Casting (metalworking) 0103 physical sciences Materials Chemistry Particle Composite material Deformation (engineering) 0210 nano-technology |
| Zdroj: | Transactions of Nonferrous Metals Society of China. 30:3043-3057 |
| ISSN: | 1003-6326 |
| DOI: | 10.1016/s1003-6326(20)65441-3 |
| Popis: | The effect of friction stir processing (FSP) at different rotation speeds (400, 630, 800, and 1000 r/min) and traverse speeds (25 and 50 mm/min) on the tribological properties of a Si particle reinforced Zn−40Al−2Cu-based in-situ composite was investigated. After preliminary optimization, 800 r/min and 25 mm/min were selected as optimum FSP parameters. According to the results, multi-pass FSP improved the tribological properties. For instance, at an applied pressure of 0.75 MPa, the wear rate and average coefficient of friction (COF) of four-pass FSPed composite were lower than those of base composite by 53% and 50%, respectively. SEM examinations of worn surfaces, wear debris, and worn subsurfaces revealed that the intensive refinement and uniform distribution of microstructural phases, especially the coarse Si particles, reduced Si particles interspacing, and elimination of casting defects were the most important factors enhancing the substrate resistance against sliding-induced deformation. This led to the formation of stable tribolayers that improved the tribological properties. |
| Databáze: | OpenAIRE |
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