Paper 13: Recent Developments in Light Alloys for Engineering Applications

Abstract

This paper covers developments during the last five years in the fields of light alloys for engineering applications. Wrought aluminium alloy development is discussed in relation to new alloys for armour-plate, missile and aerospace applications, general structural use, and alloys for decorative bright trim. Specific attributes of the various alloys are covered to a degree depending upon the particular alloy or alloy system, in relation to elevated temperature properties, cryogenic properties, corrosion resistance, weldability and, formability. New aluminium casting alloys with higher properties and better machinability are referred to. In the area of aluminium powder and particle metallurgy, newly developed porous aluminium bearings, particle sheet alloys, and exceptionally high-strength alloys are discussed. Reference is also made to new aluminium base anode alloys for cathodic corrosion protection. Magnesium alloy developments in the fields of general engineering, and in the specialized fields of aerospace and nuclear energy applications are covered and the problems of surface protection of these materials are also dealt with. Recent developments in the field of beryllium-aluminium alloys for aerospace applications are discussed in some detail.