Abstract
Some intermetallic compounds have excellent electric and magnetic characteristics, and their compositions, structures and dispersion phases in matrix have been investigated. Recently mechanical properties and fracture behaviors have drawn increasing attention. But litte has been reported on plastic working to manufacture plates and wires.As the first step of investigation of mechanical working of intermetallic compounds, the plasticity of CuAl2 were investigated by high temperature compression tests, creep tests and electrical resistivity measurements.Main experimental results obtained are as follows:(1) At room temperature, CuAl2 is brittle. Cracks are formed at the edges of micro-Vickers hardness cone depression even by a load of 500 g.(2) CuAl2 has a little plasticity at 475° and 500°C. At temperatures higher than 525°C, the plastic deformation capacity increases remarkably.(3) There is a linear relation between logarithmus of 0.2% yield stress and absolute temperatures.(4) Creep curve of CuAl2 has a tendency of metallic creep curves with the first, second and third stages.
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