초록 ▼

The present invention provides a low density aluminum-base alloy, consisting essentially of the formula AlbalZraLibMgcTd, wherein T is at least one element selected from the group consisting of Cu, Si, Sc, Ti, V, Hf, Be, Cr, Mn, Fe, Co and Ni, “a”ranges from about 0.25-2 wt %, “b”ranges from 2.7-5 w

The present invention provides a low density aluminum-base alloy, consisting essentially of the formula AlbalZraLibMgcTd, wherein T is at least one element selected from the group consisting of Cu, Si, Sc, Ti, V, Hf, Be, Cr, Mn, Fe, Co and Ni, “a”ranges from about 0.25-2 wt %, “b”ranges from 2.7-5 wt %, “c”ranges from about 0.5-8 wt %, “d”ranges from about 0.5-5% and the balance is aluminum. The alloy has a primary, cellular-dendritic, fine-grained, supersaturated aluminum alloy solid solution phase with intermetallic phases of the constituent elements uniformly dispersed therein. A consolidated article can be produced by compacting together particles composed of the aluminum alloy of the invention in a vacuum at elevated temperature. The compacted alloy is solutionized by heat treatment, quenched in a fluid bath, and optionally, stretched and aged. The microstructure of the consolidated article is composed of an aluminum solid solution containing a substantially uniform distribution of fine intermetallic precipitates.

대표청구항 ▼

A method for producing a low-density, aluminum alloy, consolidated articles, comprising the steps of: compacting particles composed of a low density aluminum-base alloy, consisting essentially of the formula AlbalZraLibMgcTd, wherein T is at least one element selected from the group consisting of Cu

A method for producing a low-density, aluminum alloy, consolidated articles, comprising the steps of: compacting particles composed of a low density aluminum-base alloy, consisting essentially of the formula AlbalZraLibMgcTd, wherein T is at least one element selected from the group consisting of Cu, Si, Sc, Ti, V, Hf, Be, Cr, Mn, Fe, Co and Ni, “a”ranges from about 0.25-2 wt %, “b”ranges from about 2.7-5 wt %, “c”ranges from about 0.5-8 wt %, “d”ranges from about 0.5-5% and the balance is aluminum, said alloy having a primary, cellular dendritic, fine-grain, supersaturated aluminum alloy solid solution phase with filamentary, intermetallic phases of the constituent elements dispersed therein, and said intermetallic phases having width dimensions of not more than about 100 nm; heating said alloy during said compacting step to a temperature of not more than about 400°C. to minimize coarsening of said intermetallic phases; solutionizing said compacted alloy by heat treatment at a temperature ranging from about 500°to 550°C. for a period of approximately 0.5 to 5 hrs to convert elements from micro-segregated and precipitated phases into said aluminum solid solution phase; and quenching said compacted alloy in a fluid bath. A method as recited in claim 6, further comprising the step of ageing said compacted alloy at a temperature ranging from about 100°-250°C. for a period ranging from about 1-40 hr.