Hot deformation behavior of austenitic stainless steel for a wide range of initial grain size

Rate controlling mechanisms during hot deformation of Mg–3Gd–1Zn magnesium alloy: Dislocation glide and climb, dynamic recrystallization, and mechanical twinning

“…Therefore, by consideration of the critical stress for initiation of DRX (σ C ), it is possible to bypass the effect of DRX. It has been shown that the onset of DRX can be detected from inflections in plots of the strain hardening rate (θ) against stress before the peak point of flow curves [26][27][28][29][30]. This analysis was performed in the current study and the resultant values of σ C were used for constitutive analysis.…”

A Simplified Approach for Developing Constitutive Equations for Modeling and Prediction of Hot Deformation Flow Stress

“…[1], in which Q is the hot deformation activation energy, _ e is the strain rate, T is the absolute temperature, and finally A¢, A¢¢, A, n¢, b, n, a are the material's parameters. [11][12][13][14][15] The stress multiplier a is an adjustable constant which brings ar into the correct range that gives linear and parallel lines in ln_ e vs lnfsinhðarÞg plots and it can be estimated by a % b/n¢.…”

Quantification of the strengthening effect of rare earth elements during hot deformation of Mg-Gd-Y-Zr magnesium alloy

“…Since the steady-state stress may not be precisely attained for all of the flow curves and obtaining the critical stress for initiation of DRX needs work-hardening rate analysis [31], it is usual to use the peak stress to find the values of A, n, ˛, and Q [32][33][34][35]. For each alloy, the selection criterion of the peak stress data from the literature was based on the consistency of stress level among the considered research works.…”