Ductile ultra-high strength aluminium alloy components
AssigneeAlcan International Limited
InventorsMartin R. Jarrett, William Dixon
Life of this patent
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Abstract
The mechanical properties of aluminium alloy extrusion in a specified transverse direction are improved by upsetting the extrusion billet in at least one direction chosen with reference to the specified transverse direction. For example, the extrusion billet may be of generally circular cross-section with one or two opposite segments arising. The extrusion may be subjected to thermomechanical treatment and/or vibration treatment. A preferred final thermomechanical treatment is also described.
Claims13
A method of producing an extruded aluminum alloy component having improved properties in a specified direction transverse to the extrusion direction, which method comprises providing an extrusion billet of the aluminum alloy, compressing the billet to cause upsetting in to the specified direction, and extruding the upset billet to form the extruded component.
A method of producing an extruded aluminum alloy component having improved properties in a specified direction transverse to the extrusion direction, which method comprises providing an extrusion billet of the aluminum alloy, compressing the billet to cause upsetting in at least one direction chosen with reference to the specified direction, and extruding the upset billet to form the extruded component, wherein the extruded component is subjected to thermomechanical treatment comprising the steps of solution treatment, an optional pre-stretch, pre-ageing, final stretch, and final ageing.
A method of producing an extruded aluminum alloy component having improved properties in a specified direction transverse to the extrusion direction, which method comprises providing an extrusion billet of the aluminum alloy, compressing the billet to cause upsetting in a direction substantially parallel to the specified direction, and extruding the upset billet to form the extruded component, wherein the extruded component is subjected to thermomechanical treatment comprising the steps of solution treatment, an optional pre-stretch, pre-aging, vibration treatment and final aging, wherein the vibration treatment is applied at or close to a resonant frequency of the component.
Dependencies are inferred from the claim text.