from the conferences organized by TANGER Ltd. provisional website
The influence of two variants of initial soaking at 1100 °C / 2 h and 1150 °C / 2 h and parameters of hot plastic deformation on the deformability of an A-286 type superalloy have been presented. The hot deformation characteristics of alloy were investigated by hot torsion tests. The tests were executed at constant strain rates of 0.1 s-1 and 1.0 s-1, and testing temperature in the range of 900 °C to 1150 °C. Plastic properties of the alloy were characterized by worked out flow curves and the temperature relationships of maximum flow stress (σpp) and strain limit (εf). The relationship between the maximum flow stress and the Zener-Hollomon parameter (Z) was described by power function. Activation energy for hot working (Q) was assessed for the alloy after two variants of initial soaking, i.e. 1100 °C / 2h and 1150 °C / 2h and amounted - respectively - 442 kJ/mol and 519 kJ/mol.Keywords: Keywords: A-286 superalloy, hot deformation, plastic properties, Zener-Hollomon parameter, activation energy for hot working
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