Microstructural Evolution during Industrial Rolling of a Duplex Stainless Steel

Abstract

Table 1. Chemical composition (in weight-%) of the studied duplex stainless steel EN 1.4462.

Effect of Microstructure before Cold Rolling on Texture and Formability of Duplex Stainless Steel Sheet

“…In the phase (a) and (c), both the specimen annealed at 1050 C after hot rolling (a) and the specimen annealed at 1200 C after hot rolling (c) had an -fiber texture. The feature of -fiber in the phase was similar to the results of previous studies, 8,10) but the intensity of the phase texture in the specimen annealed at 1200 C after hot rolling (c) was much lower than that annealed at 1050 C after hot rolling (a). This result suggests that the texture of the phase in DSS cold-rolled and annealed sheet is affected by the initial structure prior to cold rolling.…”

“…The results for hot-rolling textures of the and phases in DSS sheet were the same as for the rolling textures of bcc and fcc metals, respectively, and were similar to the previous results. [7][8][9]23) Figure 7 shows the ' 2 ¼ 45 sections of the ODFs measured in the hot-rolled and annealed sheets. After annealing at 1050 C (a) and (b), in the phase (a) there was still a strong presence of -fiber, and the texture of the phase (b) was about the same as the texture in hotrolled sheet.…”

“…[26][27][28][29][30][31][32][33] That is to say, the textures and orientation distributions of the phase influence both characteristics. There are few studies about rvalue and ridging of DSS sheet, 7,8) and the change of these characteristics is expected when the texture of the matrix phase changes as mentioned above. Table 2 shows the effect of the size of the phase before cold rolling on the r-value and ridging characteristics.…”

“…[4][5][6][7] However, the mechanism is not clear, and there have been few studies on the characteristics of microstructure and texture in hot rolling, cold rolling, and annealing. [8][9][10] In addition, the microstructural evolutions in ( þ ) microduplex stainless steel caused by thermo-mechanical processing, which combines deformation and heat treatment, were investigated. [11][12][13][14][15][16][17][18][19][20][21] Huang et al [14][15][16] showed that no recrystallization of the matrix took place when the initial structure before cold rolling was fine, but recrystallization occurred in the matrix with f111gh011i initial orientation when the initial structure was coarse.…”

Hot-Dip Aluminizing on AISI F55–UNS S32760 Super Duplex Stainless Steel Properties: Effect of Thermal Treatments

“…Indeed, ferritic phase is less involved in deformation processes imposed by cold working, which are mainly concentrated within the austenitic phase, as described by micromechanics [47][48][49][50][51]. In addition, observing the collected data, as expected, the aluminum diffusion rate increases with the strain imposed by cold working.…”