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

Effect of roll speed ratio on microstructure evolution and mechanical properties of 0.18 wt% carbon steel deformed by differential speed rolling

“…To show the effect of the roll speed ratio on the amount of the shear deformation introduced during processing by DSR, the fraction of grains with a mainly {110}//ND orientation, which are well-known shear texture components in bcc metals [13,17], and grains with {111}//ND and {110}//RD, which are also well-known as rolling texture components in bcc materials [11,12], were determined after processing at the various roll speed ratios by partitioning the EBSD data using the criteria of the grain orientation. The grains with shear orientations could be generated in steel materials by applying the shear strain, whereas the plane strain deformation introduced during the conventional rolling process resulted in grains with rolling texture orientations [11].…”

“…The grains with shear orientations could be generated in steel materials by applying the shear strain, whereas the plane strain deformation introduced during the conventional rolling process resulted in grains with rolling texture orientations [11]. Fig.…”

“…A number of studies have shown that ultrafine grains (in the sub-micrometer or even nanometer range) can be achieved by imposing extremely large plastic strains through processing using severe plastic deformation (SPD) [1][2][3]. Among SPD methods, the differential speed rolling (DSR) process was known as a promising method with the potential for the continuous production of large bulk sheet materials suitable for industrial applications [4][5][6][7][8][9][10][11][12][13][14]. In performing DSR, a sample in the form of sheet is subjected to intense plastic strain by rolling the sample utilizing two rolls with identical dimensions, but with different speeds controlled by their own motors, generating the shear strain which was imposed uniformly through the sheet.…”

Differential speed rolling of Ni3Al based intermetallic alloy – Effect of applied processing on structure and mechanical properties anisotropy

“…It was previously reported upon studies on various metals and alloys (e.g. copper [25,26], iron and low carbon steels [27,28,29], aluminum and its alloys [30,31,32] or magnesium alloys [33,34,35]), that the DSR technique may be utilized to a fabrication of ultrafinegrained materials with an enhanced strength and ductility as well as to improving a formability of rolled sheets via their crystallographic texture modification. However, so far there is a lack of information about the effect of the DSR processing on a structure evolution and related mechanical properties or a formability of the Ni 3 Al intermetallics.…”

Revealing the surface nano-enhancing mechanism of α-titanium alloy by microstructure evolution

“…The creep-resistant near-α alloy Ti-834 was specifically chosen by Thomas et al for identifying the reason of plastic deformation during shot peening, and they found that the deformation of Ti-834 involving mechanical twinning, which has occurred in the elongated primary α grain with the lowest Schmid factor, translating to an orientation which is unfavorable for 〈a〉 slip [11]. Ju et al investigated the microstructural evolution in the near-surface of pure titanium treated by water cavitation peening (WCP), and results showed that the deformation twinning and twinning interaction were induced by WCP in the strengthening layer, as well as the high density dislocations among the bands of twinning, indicating that twinning played an important role in plastic deformation of hexagonal close-packed structured metal materials [12,13]. Yet, the detailed information of plastic deformation is still not clear for α-Ti.…”