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SOLID SOLUBILITY EXTENSION AND ENNANCED STRENGHTENING IN RAPIDLY SOLIDIFIED AND EXTRUDED COPPER ALLOYS

Objective


Age hardened copper alloys represent an important class of materials for high electrical and thermal conductivity applications such as electrodes for spot welding, conducting springs and various heat sinks and also for nonspark tools in the petroleum and chemical industries. One potential route for improving the properties in alloys not containing beryllium is through rapid solidification into thin sections followed by consolidation to a bulk form.

It had been demonstrated that chill block melt spinning (CBMS) of copper chromium and copper zinc alloys into thin ribbons gave a substantial enhancement of solid solubility over the maximum values achievable by conventional solid state quenching. Consequently, on ageing, corresponding enhancements in strength occurred, in combination with high electrical conductivities. Such ductile, microcrystalline ribbon is not a practically useful form since it cannot conveniently be consolidated to bulk. Thus, it was proposed to rapidly solidify the copper alloys to a powder form by water atomization, which is a relatively inexpensive process, and to consolidate them into a rod form by warm extrusion of the vacuum canned powder.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

UNIVERSITY OF SHEFFIELD
Address
Western Bank
S10 2TN Sheffield
United Kingdom

Participants (2)

Centro de Estudios e Investigaciones Técnicas de Guipúzcoa
Spain
Address
15,Paseo De Manuel De Lardizabal 15
20009 San Sebastián
NATIONAL LABORATORY FOR ENGINEERING AND INDUSTRIAL TECHNOLOGY
Portugal
Address
Estrada Do Paco Do Lumiar 22
1649-038 Lisboa