Production of MA956 Alloy Reinforced Aluminum Matrix Composites by Mechanical Alloying
AUTOR(ES)
Gomes, Luiz Antonio Carlos Moutinho, Travessa, Dilermando Nagle, González-Carrasco, Jose Luis, Lieblich, Marcela, Cardoso, Katia Regina
FONTE
Mat. Res.
DATA DE PUBLICAÇÃO
23/10/2015
RESUMO
Aluminum matrix composites (AMC) are attractive structural materials for automotive and aerospace applications. Lightweight, environmental resistance, high specific strength and stiffness, and good wear resistance are promising characteristics that encourage research and development activities in AMC in order to extend their applications. Powder metallurgy techniques like mechanical alloying (MA) are an alternative way to design metal matrix composites, as they are able to achieve a homogeneous distribution of well dispersed particles inside the metal matrix. In this work, aluminum has been reinforced with particles of MA956, which is an oxide dispersion strengthened (ODS) iron base alloy (Fe-Cr-Al) of high Young’s modulus and that incorporates a small volume fraction of nanometric yttria particles introduced by mechanical alloying. The aim of this work is to investigate the use of MA to produce AMC reinforced with 5 and 10 vol.% of MA956 alloy particles. Homogeneous composite powders were obtained after 20 h of milling. The evolution of morphology and particle size of composite powders was the typical observed in MA. The composite powders produced with 10 vol.% MA956 presented a more accentuated decrease in particle size during the milling, reaching 37 μm after 50 h. The thermal stability of the composite and the existence of interface reactions were investigated aiming further high temperature consolidation processing. Heat treatment at 420 °C resulted in partial reaction between matrix and reinforcement particles, while at 570 °C the extension of reaction was complete, with formation in both cases of Al-rich intermetallic phases.
Documentos Relacionados
- Mechanical Behavior of Multiwalled Carbon Nanotube Reinforced 7075 Aluminum Alloy Composites Prepared by Mechanical Milling and Hot Extrusion
- Effect of Heating Method on Microstructure and Mechanical Properties of Zircon Reinforced Aluminum Composites
- The dynamic-mechanical behavior of epoxy matrix composites reinforced with ramie fibers
- The effects of mechanical alloying on the extrusion process of AA 6061 alloy reinforced with Si3N4
- Synthesis, Characterization and Dry Sliding Wear Behavior of In-situ Formed TiAl3 Precipitate Reinforced A356 Alloy Produced by Mechanical Alloying Method