High-temperature deformation properties of CuCr0.6 alloy

Abstract

The submitted paper aimed to investigate the hot deformation behavior of CuCr0.6 alloy. Nil strength temperature of 1349 K and nil ductility temperature of 1313 K have been experimentally determined. Formability is monotonously increased with the decrease of forming temperature in the temperature range from 923 K to approx. 1273 K. The flow stress curves were obtained in the forming temperature interval of 923-1223 K and at a strain rate of 0.1-10 s −1. After their analysis, the hot deformation activation energy of 340 kJ mol −1 was calculated for peak stress and 393 kJ mol −1 for steady state. This proves that the value of the activation energy depends upon a strain size.

Hot Deformation Behaviour of Mn–Cr–Mo Low-Alloy Steel in Various Phase Regions

“…This shortcoming can be eliminated by the application of the specially developed software ENERGY 4.0 (VŠB-TU Ostrava, Czech Republic) [35], which uses the aforementioned values of n and β only as the preliminary estimate of parameters for final refining via the non-linear regression analysis of all data corresponding to Equation (2). Calculation of the hot deformation activation energy from experimental peak stress values on the basis of Equation ( 2) is the approved method that was applied for different types of metallic materials, recently for example for various steel grades [7,[36][37][38][39], intermetallic compounds [6,[40][41][42][43], alloys based on aluminium [12,[44][45][46], copper [47,48], titanium [49,50], magnesium [51,52], cobalt [53,54], etc.…”