Corrosion and Mechanical Behaviours of Cu-Cr In Situ Composites

Y. Choi; M.S. Song; K.L. Lee; Sun Ig Hong

doi:10.4028/www.scientific.net/MSF.503-504.901

Paper Titles

Principals of Indirect Equal Channel Angular Drawing for Processing of Ultrafine Grained Materials
p.877

Microstructure and Corrosion Behaviour of Ultrafine-Grained Copper
p.883

Mechanical Properties of ECAP Processed Magnesium Alloy AS21X
p.889

Fine-Grained Structures Associated with Deformation Twin and Its Influence on Tensile Behaviours in a Cold-Rolled Fe-Ni Alloy
p.895

Corrosion and Mechanical Behaviours of Cu-Cr In Situ Composites
p.901

Interfacial Structures of Cu-Nb Filamentary Nanocomposites in the As-Drawn and Annealed Conditions
p.907

Martensite Transformation of Ultrafine Grained Austenite in Fe-28.5at%Ni Alloy
p.913

Annealing Behavior and Recrystallized Texture in ARB Processed Copper
p.919

Grain Boundary Structure in ARB Processed Copper
p.925

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Corrosion and Mechanical Behaviours of Cu-Cr In Situ Composites

Abstract:

The Cu-10vol.% Cr in situ composites were fabricated and their mechanical and corrosion properties were determined. For an equivalent amount of deformation, fcc-bcc composites have a much thinner effective fibre thickness and a much larger interfacial area than do fcc-fcc composite. The yield strength and the modulus of the composite decrease with temperature whereas the failure strain increases with temperature. The observed increase in failure strain with an increase in temperature from 22-600°C is as high as 333 %. Corrosion potential and rate in aerated hydro-sulfuric acid solution are -36.6 mVSHE and 3.525x10-3 A/cm2, respectively. Based on the electrochemical behaviors of the copper and chromium and observation of corrode surface, the corrosion mechanism of the copper-10% chromium composites in aerated hydro-sulfuric acid solution includes deallying mechanism in α-phase and galvanic corrosion at the interface between copper and chromium.