Por favor, use este identificador para citar o enlazar este ítem:
http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1472| MICROSTRUCTURE AND MECHANICAL BEHAVIOR OF 2024 ALUMINUM ALLOY REINFORCED WITH ALUMINA NANOPARTICLES BY MECHANICAL MILLING | |
| Carla Lopez Medina MIGUEL ANGEL NERI FLORES JOSE LUIS HERNANDEZ RIVERA | |
| Acceso Abierto | |
| Sin Derechos Reservados | |
| Aluminum alloy | |
| 2024 Aluminum alloy reinforced with alumina nanoparticles (15nm) was produced by mechanical milling (MM) to obtain a metal matrix composite (MMC). The selected alumina content was 0.0, 1.0, 2.0, 3.0, 4.0 and 5.0 wt.%. Consolidated bulk material was obtained by pressing the milled powder under an uniaxial load, after that, sintering and hot extruding were applied using indirect extrusion with a ratio of 1:16 to obtain the final material. The microstructural characterization was done by transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), scanning electron microscopy (SEM), chemical analysis by characteristic X-ray energy dispersion spectroscopy (EDS) and X-ray diffraction (XRD). The best results were obtained at 2.0 wt.% of alumina that is the critical value of ceramic nanoparticle reinforcement in this material. At this point the yield and tensile strength were 220.9 and 443.6 MPa respectively. With 3.0 wt.% or bigger values in alumina reinforcement particles, the green bulked material has lower densification of the aluminum powder, the agglomeration of nanoparticles takes place, and reduces the effectiveness with the strength in the MMC. The most important strengthening mechanisms were: the hardening by dispersion of the second phase, the subsequent effect over the dislocations line movement, grain refinement, thermal mismatch between aluminum alloy and alumina nanoparticles, the Orowan looping, and intermetallics crystallization. | |
| 2013 | |
| Memoria de congreso | |
| Inglés | |
| OTRAS | |
| Versión revisada | |
| submittedVersion - Versión revisada | |
| Aparece en las colecciones: | Artículos de Congresos |
Cargar archivos:
| Fichero | Tamaño | Formato | |
|---|---|---|---|
| MICROSTRUCTURE AND MECHANICAL BEHAVIOR OF 2024 ALUMINUM ALLOY REINFORCED WITH ALUMINA NANOPARTICLES BY MECHANICAL MILLING.pdf | 1.25 MB | Adobe PDF | Visualizar/Abrir |