Analysis of strength and plasticity of the composites Cu-35Cr and Cu-65Cr, obtained by extrusion in the solid phase


I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Omeliana Pritsaka str.,3, Kyiv, 03142, Ukraine
Electrical Contacts and Electrodes - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2010, #10


The comparative analysis of physico-mechanical properties and structure of the Cu–Cr composites with content of chromium 35 and 65 % (vol.) , obtained by pressure in the solid phase in the vacuum at the temperatures 750, 850, 950 and 1050 °C is carried out. Furthermore, the layer speciments which consist of two layers, whose compositions correspond to these indicated composites are investigated. The layer speciments has been obtained on the way joint short-term pressure of porous billets at a temperature 850 °C by the pressure 1200 MPa. The analysis of the fracture surface of composites after the compression and bend tests by the method of quantitative metallography is carried out. It is shown that the strength of these composites under condition of chromium skelet formation is determined by the strength of chromium.