Metallurgy, Vol. 43 No. 4, 2004.
Original scientific paper
Estimation of Activation Energy for Calculating the Hot Workability Properties of Metals
G. Kugler
M. Knap
H. Palkowski
R. Turk
Abstract
The hot workability of metals is most commonly described by the hyperbolic-sine constitutive equation, which relates stress with strain rate and temperature. In the present paper a simple method for calculating the parameters of this equation is introduced. Hot compression experiments of an AA6082 aluminium alloy were carried out to check the reliability of the proposed method. Based on analysis of the experimental results, a simple semi-empirical equation to describe the flow stress as a function of strain, strain rate and temperature was formulated. A good agreement between the predicted and the experimental data was achieved.
Keywords
Hrčak ID:
128107
URI
Publication date:
1.10.2004.
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