Abstract
A new mathematical model for hot deformation flow curves is presented. The developed expression can be used for austenite or ferrite deformation, for monotonically increasing flow curves as well as for those with a maximum or with oscillating shape. By experimental determination of 4 flow curves, the parameters for the flow curve field can be calculated. Experiments have been carried out using aluminium‐ killed mild steels in hot compression tests with a range of deformation temperature between 700 and 1250°C and of strain rate between 0.1 and 20 s‐1. The accuracy of the new approach and the ability to meet the different flow curve shapes proved to be very good.
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