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Deformation of Cu-Al2O3 composite materials

Besterci M., Lachvac J., Velgosova O., Lesko A.

Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika

2000

z. 54 [179]

7-10

Deformation processes of Cu-Al2OS composite materials prepared via powder metallurgy are assessed in the paper. Powder mixture was prepared by grinding of Cu and Al2O3 particles. After the compaction, materials were deformed by extrusion, forging and isostatic pressing. Qualitatively were evaluated their microstructural characteristics and quantitatively their mechanical properties. By comparison of mentioned three deformation technologies it was found the isotropic microstructure in materials deformed by forging and isostatic pressing. Optimum properties (ultimate tensile strength and reduction of area) showed the materials deformed by hot isostatic pressing, which possessed low residual porosity ( <1 vol. %).