Abstract

A multiphase nanocrystalline Al93Fe3Cr2Ti2 alloy containing 30 vol% intermetallic particles was prepared via mechanical alloying, followed by hot extrusion. Systematic compressive tests and modulus measurements were performed as a function of temperature and strain rate. High strengths and moduli at both ambient and elevated temperatures were demonstrated. The results clearly indicated that the multiphase nanocrystalline Al93Fe3Cr2Ti2 alloy has great potential for structural applications. Furthermore, the strength of the multiphase nanocrystalline Al alloy at both room and elevated temperatures increased with the decrease in the grain size, suggesting that diffusional creep is suppressed in this alloy, even though the grain size of the alloy is below 100 nm.

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