Metal treatment – Stock – Age or precipitation hardened or strengthened
Patent
1995-06-14
1996-11-26
Andrews, Melvyn
Metal treatment
Stock
Age or precipitation hardened or strengthened
148549, 148416, 148417, 148418, 148437, 148438, 148439, 148440, 420528, 420529, 420535, 420542, 420544, 420545, 420548, 420549, 420550, 420551, 420552, 420553, 420590, C22C 2100
Patent
active
055781446
ABSTRACT:
To provide a high-strength, high-ductility cast aluminum alloy, which enables a near-net shape product to be produced by improving the casting structure of an aluminum alloy, particularly by using specific constituents and controlling the cooling rate, and a process for producing the same. The high-strength, high-ductility cast aluminum alloy of the present invention is characterized in that it has a structure comprising fine grains of .alpha.-Al, having an average grain diameter of not more than 10 .mu.m, surrounded by a network of a compound of Al-lanthanide-base metal, the .alpha.-Al grains forming a domain, that the domain comprises an aggregate of .alpha.-Al grains which have been refined, cleaved, and ordered in a single direction and that it has a composition represented by the general formula Al.sub.a Ln.sub.b M.sub.c wherein a, b, and c are, in terms of by weight, respectively 75%.ltoreq.a.ltoreq.95%, 0.5%.ltoreq.b<15%, and 0.5%.ltoreq.c<15%.
REFERENCES:
patent: 5431751 (1995-07-01), Okochi et al.
Mahasan, et al., "Rapidly Solidified Microstructure of Al-8Fe-4 Lanthanide Alloys", Journal of Materials Science, 22(1), 1987; pp. 202-206.
Okochi Yukio
Satou Kazuaki
Andrews Melvyn
Koehler Robert R.
Toyota Jidosha & Kabushiki Kaisha
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