Reactive mechanism and mechanical properties of in-situ hybrid nano-composites fabricated from an Al–Fe2O3 system by friction stir processing
| Autor: | Martin Nosko, Peter Švec, Ghasem Azimi-Roeen, Seyed Farshid Kashani-Bozorg |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Friction stir processing Materials science Mechanical Engineering Metallurgy Alloy Composite number chemistry.chemical_element 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Grain size Hot working chemistry Mechanics of Materials Aluminium 0103 physical sciences Ultimate tensile strength engineering General Materials Science Composite material 0210 nano-technology Electron backscatter diffraction |
| Zdroj: | Materials Characterization. 127:279-287 |
| ISSN: | 1044-5803 |
| DOI: | 10.1016/j.matchar.2017.03.007 |
| Popis: | In-situ Al/(Al13Fe4 + Al2O3) hybrid nano-composite was fabricated using reactive friction stir processing (FSP) by introduction of Fe2O3 powder into the stir zone of rolled AA1050 aluminum alloy. Composite reinforcements were produced in-situ by exothermic reaction of Al and Fe2O3 that initiated by hot working characteristics of FSP. However, the existence of intermediate phase (Fe3O4) suggests that the reaction was not completed due to short time of FSP. EBSD results showed that the matrix mean grain size decreased to 8 and 3 μm after FSP without and with introduction of powder, respectively; this was also associated with the marked increase in HAGB. The fabricated nano-composite exhibited superior hardness (45 HV) and ultimate tensile strength (~ 171 MPa) as compared to those of the base and FSPed alloy with no powder addition. Formation of in-situ reinforcements and grain refinement acted as major and minor contributors to enhancement of mechanical properties (hardness and ultimate tensile strength), respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect