Analysis of Grain Colonies in Type 430 Ferritic Stainless Steels by Electron Back Scattering Diffraction (EBSD).

Brochu, Myriam; Yokota, Takeshi; Satoh, Susumu

doi:10.2355/isijinternational.37.872

Cited by 50 publications

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“…24,25) Moreover, the ridging phenomenon in ferritic stainless steel sheet has been explained by the anisotropic plastic flow caused by the orientational colonies that originate mainly in cast and hotrolling structures and are of -fiber texture. [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.…”

Section: Effects On R-value and Ridging Propertiesmentioning

confidence: 99%

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

Hamada

Ono

2010

Mater. Trans.

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The evolution of the microstructure and texture of type 329J4L duplex stainless steel (DSS) sheet during cold rolling and annealing were examined, and the effect of the initial microstructure before cold rolling on texture and formability was investigated. The texture of the phase in the hot-rolled and annealed sheet had a strong -fiber texture, and this was stable even in cold-rolled and annealed sheet. However, in the case of a coarse grain caused by high-temperature annealing prior to cold rolling, the -fiber texture and colony with h100i == ND orientation in the phase were reduced in cold-rolled and annealed sheet. This control of the -fiber texture in the phase in cold-rolled and annealed sheet improved the elongation, r-value, and ridging characteristics. These results showed that the texture and the formability of type 329J4L DSS coldrolled and annealed sheet depended on the texture of the phase and the initial phase morphology before cold rolling.

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Section: Effects On R-value and Ridging Propertiesmentioning

confidence: 99%

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

Hamada

Ono

2010

Mater. Trans.

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“…2,3,6,9,13,14,[22][23][24] Recently, the local orientation of recrystallized ferritic stainless steel sheets has been investigated by EBSP (Electron Back Scattering Pattern), the grain colony bands elongated parallel to the rolling direction have been observed and the ridging profiles have been simulated. 28,29) Various methods have been proposed to reduce the grain colony bands and improve ridging. 10,12,17,[19][20][21][22][25][26][27] It is thought that controlling the cast structure [19][20][21] is a key technology.…”

Section: Introductionmentioning

confidence: 99%

Effect of Initial Solidified Structure on Ridging Phenomenon and Texture in Type 430 Ferritic Stainless Steel Sheets

et al. 2003

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“…This mismatch is not related to intrinsic material properties and can be solved easily by optimization of the forming process. In contrast, microstructural defects inside the metal sheet such as dislocation bands, misoriented grain colonies, and hard precipitate particles can result in surface roughening during plastic deformation [10][11][12][13][14][15].…”

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Analysis of the surface-roughening phenomenon in P-added bake-hardened steel sheets

Goo

Kang

2014

Integr Mater Manuf Innov

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The surface-roughening problem with phosphorous-added bake-hardened steel sheets was investigated. Surface undulation in the sheets occurs after 2% to 3% deformation during press forming action and disappears with further deformation over 10%. The roughened sheets exhibit heterogeneity of the elemental P (phosphorous) distribution, and the segregation of P increases the hardiness of ferrite grains locally. This local strengthening of ferrite grains causes a concentration of strains in the other ferrite regions that do not contain the elemental P-segregation. The strain concentration is because of the surface undulation in the sheets under small amount of straining. The evolution of the deformation texture and the corresponding Lankford values are shown using a series of viscoplastic self-consistent (VSPC) simulations, which indicated that a strong {554}[225] texture develops, and subsequently, the Lankford value increases in the non-segregated ferrite region. The higher Lankford value makes it more difficult to deform the sheet in the through-thickness direction. The different texture developments of the segregated and segregation-free regions are the main causes of the disappearance of the surface undulation with a high amount of plastic straining greater than 10%. Finally, we conclude that the segregation of P inherited from hot band affects the plastic deformation and developed textures of the thin steel sheets.

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Analysis of Grain Colonies in Type 430 Ferritic Stainless Steels by Electron Back Scattering Diffraction (EBSD).

Abstract: E-mai I: t yokota@g i ken.kawasaki-steel .co.j p

Cited by 50 publications

References 0 publications

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

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

Effect of Initial Solidified Structure on Ridging Phenomenon and Texture in Type 430 Ferritic Stainless Steel Sheets

Analysis of the surface-roughening phenomenon in P-added bake-hardened steel sheets

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