The effects of lithium content on the ageing characteristic and notched tensile properties of particulate reinforced Al-Li-Cu-Mg-Zr-based metal matrix composites (MMCs) have been investigated. MMC sheet containing 20 wt.-% silicon carbide particulate produced by a conventional powder metallurgy route aged at a similar rate as unreinforced sheet, and the highest strengths were achieved in samples containing 2 to 2.5 wt.-% Li. A proprietary processed 8090 Al-Li-alloy MMc sheet aged more rapidly, however, and gave considerably higher strengths. The toughness of Al-Li-Cu-Mg-Zr-MMC sheet, as indicated by the notched tensile behaviour, can be improved by reducing the lithium content albeit at the expense of strength.
Ageing behaviour and toughness of silicon carbide particulate reinforced Al-Li-Cu-Mg-Zr metal matrix composites
Alterungsverhalten und Zähigkeit von Verbundwerkstoffen bestehend aus mit Siliciumcarbidteilchen verstärkten Al-Li-Cu-Mg-Zr-Legierungen
Journal of Materials Science ; 30 , 9 ; 2263-2268
1995
6 Seiten, 7 Bilder, 2 Tabellen, 16 Quellen
Aufsatz (Zeitschrift)
Englisch
dispersionsgehärteter Werkstoff , Aluminiumlegierung , Siliciumcarbid , Lithiumzusatz , Dispersionsgefüge , Luftfahrtindustrie , Raumfahrtindustrie , mechanische Eigenschaft , Zugfestigkeit , Kerbschlagzähigkeit , Rissempfindlichkeit , Dehngrenze , Altern , intermetallische Verbindung , Ausscheidung , Transmissionselektronenmikroskopie , optische Mikroskopie , Mikroskop , Luftfahrttechnik , Raumfahrttechnik
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