The thermal effect of deformation during the ECAP processing of the Cu-0.6Cr alloy

The work is aimed at solving the problem of determining the magnitude of the thermal effect arising in an alloy of the Cu-Cr system in the process of deformation by the ECAP method. For this, an approach was used based on the analysis of temperature and physical and mechanical characteristics of a unit volume of metal subjected to upsetting carried out on the Gleeble 3500 physical modeling complex. Upsetting was carried out at the degree of accumulated strain of e =1.1 at different rates of deformation (3, 30, 300 mm / s) and initial temperatures (20, 400 and 800°С). Based on the results obtained, a database was created for modeling in the Deform-3D system. The analysis of the heat capacity value is carried out and the contribution of the structural component to the used heat capacity coefficient in the Deform-3D system is estimated. Further, the ECAP process was modeled and the analysis of thermal fields and stress-strain state was carried out. It is shown that at a deformation rate of 30 mm / s, the heating reaches 99°C at room temperature and 63°C and at 400°C. The difference between the heating temperatures, with and without taking into account the heat transfer between the sample and the tooling, does not exceed 8 %.

Influence of strain rate on deformation behaviour of an AX52 alloy processed by equal channel angular pressing (ECAP)

Z. Trojanová, K. Halmešová, J. Džugan, P. Palček, P. Minárik, P. Lukáč

Low temperature superplasticity of the ECAP Al7075-based alloy

P. Málek, O. Molnárová, P. Lejček

The role of phase transitions in the evolution of dispersion particles in chromium bronzes upon the equal channel angular pressing

I.A. Faizov, G.I. Raab, S.N. Faizova, N.G. Zaripov, D.A. Aksenov, D.A. Aksenov

Effect of long-term natural aging on microstructure and room temperature superplastic behavior of UFG/FG Zn-Al alloys processed by ECAP

M. Demirtas, H. Yanar, G. Purcek

1. Russian Science Foundation - 19-19-00432