Rapport entre la forme exacte des courbes de traction des métaux et les modifications concomitantes de leur structure

Effect of annealing on the microstructure and mechanical properties of cold rolled Fe–24Mn–3Al–2Si–1Ni–0.06C TWIP steel

“…The Crussard-Jaoul analysis [26,27] based on the Ludwik equation [21] and the modified C-J analysis [25] based on the Swift equation [23] returned the same transition points for various work hardening regions A through D as obtained in Table 1. Moreover, fitting of the flow curve by the Ludwik and Swift equations was only possible after estimating their respective fitting parameters for each of the work hardening regions.…”

“…To this end, Jin and Lee [12] preferred the modified Crussard-Jaoul (C-J) analysis [25] based on the Swift equation to delineate the work hardening stages in a Fe-18Mn-0.6C-1.5Al TWIP steel. On the other hand, Dini et al [14] analysed the work hardening behaviour of Fe-31Mn-3Al-3Si TWIP steel with different grain sizes using the C-J analysis [26,27] based on the Ludwik equation.…”

Austenite Stability Effects on Tensile Behavior of Manganese-Enriched-Austenite Transformation-Induced Plasticity Steel

“…The tensile data illustrate significant systematic changes in deformation behavior with annealing temperature, which are amplified in Figure 6(b), which expands the low strain region to highlight differences in yielding behavior between the five conditions. Observed differences in the strain hardening behavior during continuous deformation (i.e., beyond the yield point elongation (YPE) region for those samples that exhibited YPE) are shown in Figure 7, which presents Jaoult-Crussard analyses [28,29] of the true working hardening rate of the annealed structures as a function of strain. In Figure 7, the logarithm of the true work hardening rate is plotted vs the logarithm of the true plastic strain, and work hardening behavior differences, particularly at low strains, are amplified to illustrate regimes in strain hardening.…”

Effects of Strain Hardening and Fine Structure on Strength and Toughness of Tempered Martensite in Carbon Steels

“…Therefore the strain hardening of the steels was characterized as a function of strain by two approaches. Figure 5 shows a Jaoul-Crussard analysis, which plots the log of the strain hardening rate as a function of the log of the true plastic strain [16,17]. At all levels of plastic strain, the strain hardening increases directly with carbon content of the LIT martensite.…”