Alcan International Limited

The Secretary of State for Defence in Her Britannic Majesty's Government

Defence Research Agency

William S Miller

Roger Grimes

Alan Gray

Christopher J Peel

Roger Moreton

Stephen Mark Flitcroft

Simon Brian Dodd

Timothy Frederick Bryant

A treatment process for a composite comprising a matrix of a precipitation hardenable aluminum alloy and a particulate or short fiber ceramic reinforcement. The process includes hot and/or cold working the composite, subjecting the composite to a controlled heating step in which the composite is raised from ambient temperature to a temperature of from 250 to 450.degree. C. at a rate of temperature increase less than 1000.degree. C. per hour, and subjecting the resulting heat treated composite to a solution treating step.

Method of treatment of metal matrix composites

A method of treating a blank of an aluminium base alloy comprising a combination of heat treatments and cold forming operations to produce a highly recovered semi-fabricated wrought product that is not statically recrystallized and that is inherently non-superplastic and is capable of superplastic deformation only after an initial non-superplastic deformation to achieve dynamic recrystallization.

Metal treatment

An aluminum base alloy having a composition selected from:

Aluminum alloys

An aluminium base alloy having a composition within the following ranges in weight percent:

Aluminium alloys

A method of producing sheet or strip from a rolling ingot of an aluminum alloy which contains lithium and constituents selected from the following groups 1 and 2:

Aluminum alloy heat treatment

A method of superplastically deforming a blank of a metallic alloy which:

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Gerrards Cross, United Kingdom

William S Miller