Effect of reinforcement geometry on precipitation kinetics of powder metallurgy AA2009/SiC composites
2009; Elsevier BV; Volume: 479; Issue: 1-2 Linguagem: Inglês
10.1016/j.jallcom.2008.12.114
ISSN1873-4669
AutoresP. Rodrigo, P. Poza, M.V. Utrilla, A. Ureña,
Tópico(s)Advanced ceramic materials synthesis
ResumoThe effect of reinforcement morphology on metastable precipitation in AA2009 matrix composite reinforced with 15% volume of SiC has been studied. AA2009 is a special formulation Al–Cu–Mg alloy for discontinuously reinforced aluminium (DRA) whose ageing behaviour and precipitation kinetics are not well defined. The ageing kinetics for this material have been evaluated at two different ageing temperatures (170 and 190 °C). Hardness peaks in the two different precipitation sequences existing in the matrix alloy have been identified. The response of composites to the ageing treatments was evaluated by means of Vickers hardness and micro-hardness measurements on polished specimens and was also studied by differential scanning calorimetry (DSC).
Referência(s)