Cu precipitation in AlCu-Al{sub 2}O{sub 3} metal matrix composites
Journal Article
·
· Acta Metallurgica et Materialia
- Ecole Polytechnique Federale de Lausanne (Switzerland). Inst. de Genie Atomique
Metal matrix composite materials Al-4%Cu reinforced with different volumetric fractions of Al{sub 2}O{sub 3} (Saffil) fibers were produced by ``squeeze casting``. The composites were characterized by thermoelectric power measurements and mechanical spectroscopy measurements, in order to identify the effect of the fibers on the precipitation of Cu and the microstructure of the alloy. The formation of Guinier-Preston zones was found to be hindered by the presence of fibers, while the formation of {theta}{prime} precipitates was favored in the composites. TTT diagrams of Cu precipitation in the composites have been drawn, which characterize well their different response to aging compared with that of the unreinforced matrix. The elastic moduli of the composites were confirmed to be higher than that of the unreinforced alloy.
- OSTI ID:
- 72432
- Journal Information:
- Acta Metallurgica et Materialia, Journal Name: Acta Metallurgica et Materialia Journal Issue: 6 Vol. 43; ISSN 0956-7151; ISSN AMATEB
- Country of Publication:
- United States
- Language:
- English
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