Structure evolution during hot deformation of a CMnVN steel grade

Hot deformation behavior of a medium carbon microalloyed steel

“…Plots used for calculation of deformation activation energy (the peak stress and temperature values are in MPa and K, respectively). consistent with the values reported for another medium carbon microalloyed steel [11] and the present steel using a different approach [1].…”

“…(6)-(8) yields to the following equations, respectively: (11) It follows from these expressions that the slope of the plot of ln • ε against ln P and the slope of the plot of ln • ε against P can be used for obtaining the values of n andˇ, respectively. These plots are shown in Fig.…”

“…According to Eq. (11), the slope of the plot of ln • ε against ln{sinh(˛ P )} can be used for obtaining the value of n (Fig. 5c).…”

Microstructure and stability conditions for hot deformation of a modified iron-based superalloy

“…Values of 0 (at peak) and 0.2 where taken for θ and m, respectively. The Garofalo parameters A,Q n and α of the Garofalo equation [15] were calculated from the experimental data by means of a nonlinear method without the use of initial values involving an algorithm specifically developed for the treatment of this equation [16,17]. This is an alternative to the RCR method used elsewhere [18,19] and other methods used in the literature [20,21].…”

“…Determination of {A, Q, n, α} requires suitable algorithms since this is a highly non-linear equation [16,17].…”