Ykk Corporation

Koji Saito

Kazuhiko Kita

Teruaki Onogi

Koju Tachi

Junichi Nagahora

Kenji Higashi

High-strength, high-ductility aluminum alloy

A process for producing a shaped article, comprising: preparing a first powder having high strength and rigidity after completion of forming, and a second powder having abrasion resistance and surface hardness after completion of forming; compacting those powders to provide a forming material comprising a base part comprising the first powder and a supplemental part comprising the second powder; and forming the forming material into a shaped article by plastic processing, thereby producing a shaped article in which the base part and the supplemental part have different characteristics. The first powder preferably comprises a rapidly-solidified alloy powder and the second powder preferably comprises at least one member selected from among Al,O,, Si,N,, BN, SiC, Al,C,, Al,B,O,and B,O or a mixture of the member and the first powder which may be the same one actually used as the first powder or another one having a different compositions from that of the actually used first powder. The resultant shaped alloy material has an advantageous combination of plural excellent properties, such as high strength and abrasion resistance.

Process for producing shaped article

A high-strength aluminum-based alloy consisting essentially of a composition represented by the general formula: Al.sub.bal Mn.sub.a M.sub.b or Al.sub.bal Mn.sub.a M.sub.b TM.sub.c wherein M represents one or more members selected from the group consisting of Ni, Co, Fe and Cu, TM represents one or more members selected from the group consisting of Ti, V, Cr, Y, Zr, La, Ce and Mm and a, b and c each represent an atomic percent (at %) in the range of 2.ltoreq.a.ltoreq.5, 2.ltoreq.b.ltoreq.6 and 0&lt;c.ltoreq.2 and containing monoclinic crystals of an intermetallic compound of an Al.sub.9 Co.sub.2 -type structure in the structure thereof. The Al-based alloy has excellent mechanical properties including a high hardness, high strength and high elongation.

High-strength aluminum-based alloy

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Sendai, Japan

Koji Saito