3. Explanations of the values given

3.1. Keyword factor HIST_EXP

The first 8 values of the VALE keyword under the factor HIST_EXP keyword define thermal history:

• the first value is the value of the derivative of the function T (t) cooling rate,

• the second value is the time_temperature equivalent parameter defining austenitization,

• the following 6 values define the coefficients of monomes of degrees 0 to 5 such that the polynomial of order 5 thus constructed is the interpolation between AR3 and TMF in the least squares sense of the function F (T) deduced from the thermal history and such that F (T) = ln (t (T))).

The following values (necessarily in groups of 4) define the respective proportions of ferrite, pearlite and bainite present at a given temperature for the experimental thermal history defined by the first 8 values.

3.2. Keyword factor TEMP_MS

These 5 values define the quantities involved in the law of evolution of the temperature Ms as a function of the austenitization conditions and the quantities of ferrite, pearlite and bainite already formed. This law is associated with diagram TRC.