Identification of σ and Ω phases in AA2009/SiC composites
2009; Elsevier BV; Volume: 482; Issue: 1-2 Linguagem: Inglês
10.1016/j.jallcom.2009.03.154
ISSN1873-4669
AutoresP. Rodrigo, P. Poza, M.V. Utrilla, A. Ureña,
Tópico(s)Microstructure and mechanical properties
ResumoThe microstructure evolution during ageing treatment at 170 and 190 °C of AA2009/SiC composites, reinforced with 15 vol.% particulates and whiskers, was studied by transmission electron microscopy. Besides θ′ and S′ phases, the typical hardening precipitates on Al–Cu–Mg alloys, it was found the presence of Ω and σ (Al5Cu6Mg2) phases in the matrix. σ phase was only found in the matrix of particulate composite, while Ω phase appeared in both. This phase has not been previously observed in Al matrix composites based on conventional Al–Cu–Mg alloys.
Referência(s)