Annealing behavior of severely deformed IF steel via the differential speed rolling method

Strain and crystallographic texture evaluation of interstitial free steel cold deformed by differential speed rolling

“…A differential speed rolling (DSR) technique is a process in which different rotational speeds of upper and lower rolls are applied, so that the shear strain could be imposed throughout the samples due to the asymmetric deformation characteristics [5,6]. Several studies have been conducted to undertake the microstructure, mechanical properties, and texture formation of the various metallic materials fabricated via a DSR process, such as magnesium [7], aluminum [8], copper [6,9], titanium [10], and steel [5,[11][12][13]. The results of these studies showed that the intense plastic strain by DSR could lead to a significant reduction in grain size together with enhanced mechanical properties.…”

Thermal stability of an ultrafine-grained dual phase TWIP steel

“…This is related to the presence of considerable internal stress and a high density of dislocations located at the low angle grain boundaries or within the grains in their microstructures [21,22]. These, in turn, induce a large amount of excess free energy into the material, which makes the microstructure thermally unstable [23][24][25][26]. In other words, the high dislocation density and high fraction of nonequilibrium grain boundaries may reduce the activation energy needed for recrystallization and subsequent grain growth.…”

Ti/Al Multi-Layered Sheets: Differential Speed Rolling (Part B)

“…For ESR, shear deformation is restricted to the near surface region [8,9]. In the case of DSR, the volume that is affected by shear is strongly material dependent as shown in numerous studies on different materials, e.g., steel, copper, aluminium and niobium [3,[10][11][12][13][14][15]. Special attention is paid to the investigation of DSR of hexagonal metals such as magnesium [4,[16][17][18] and titanium [6,[19][20][21].…”